<?xml version="1.0" encoding="iso-8859-1" standalone="no"?>
<!DOCTYPE GmsArticle SYSTEM "http://www.egms.de/dtd/2.0.34/GmsArticle.dtd">
<GmsArticle xmlns:xlink="http://www.w3.org/1999/xlink">
  <MetaData>
    <Identifier>dgkh000560</Identifier>
    <IdentifierDoi>10.3205/dgkh000560</IdentifierDoi>
    <IdentifierUrn>urn:nbn:de:0183-dgkh0005600</IdentifierUrn>
    <ArticleType>Research Article</ArticleType>
    <TitleGroup>
      <Title language="en">Involvement of the mouth and jaw area in dermatological diseases</Title>
      <TitleTranslated language="de">Beteiligung des Mund- und Kieferbereichs bei dermatologischen Erkrankungen</TitleTranslated>
    </TitleGroup>
    <CreatorList>
      <Creator>
        <PersonNames>
          <Lastname>Ramiah</Lastname>
          <LastnameHeading>Ramiah</LastnameHeading>
          <Firstname>Vasudevi</Firstname>
          <Initials>V</Initials>
        </PersonNames>
        <Address>
          <Affiliation>Department of Dental Surgery, Governement Medical College and Hospital, Krishnagiri, Tamil Nadu, India</Affiliation>
        </Address>
        <Creatorrole corresponding="no" presenting="no">author</Creatorrole>
      </Creator>
      <Creator>
        <PersonNames>
          <Lastname>Sankar</Lastname>
          <LastnameHeading>Sankar</LastnameHeading>
          <Firstname>Shenbaga Lalitha</Firstname>
          <Initials>SL</Initials>
        </PersonNames>
        <Address>
          <Affiliation>Department of Biochemistry, Tagore Medical College and Hospital, Rathinamangalam, Chennai, Tamil Nadu, India</Affiliation>
        </Address>
        <Creatorrole corresponding="no" presenting="no">author</Creatorrole>
      </Creator>
      <Creator>
        <PersonNames>
          <Lastname>Shunmugavelu</Lastname>
          <LastnameHeading>Shunmugavelu</LastnameHeading>
          <Firstname>Karthik</Firstname>
          <Initials>K</Initials>
        </PersonNames>
        <Address>Department of Dentistry, PSP Medical College Hospital and Research Institute Tambaram Kanchipuram, Main Road Oragadam Panruti, Kanchipuram District Tamil Nadu 631604, India; phone: &#43;91 9789885622&#47;9840023697<Affiliation>Department of Dentistry, PSP medical college hospital and research institute Tambaram Kanchipuram main road Oragadam Panruti Kanchipuram district Tamil Nadu, India</Affiliation></Address>
        <Email>drkarthiks1981&#64;gmail.com</Email>
        <Creatorrole corresponding="yes" presenting="no">author</Creatorrole>
      </Creator>
      <Creator>
        <PersonNames>
          <Lastname>Hussain</Lastname>
          <LastnameHeading>Hussain</LastnameHeading>
          <Firstname>Sajid Tajamul</Firstname>
          <Initials>ST</Initials>
        </PersonNames>
        <Address>
          <Affiliation>Department of Periodontology and Implantology, Sree Balaji, Dental College and Hospital, Chennai, Tamil Nadu, India</Affiliation>
        </Address>
        <Creatorrole corresponding="no" presenting="no">author</Creatorrole>
      </Creator>
      <Creator>
        <PersonNames>
          <Lastname>Sadasivam</Lastname>
          <LastnameHeading>Sadasivam</LastnameHeading>
          <Firstname>Manju Palanisamy</Firstname>
          <Initials>MP</Initials>
        </PersonNames>
        <Address>
          <Affiliation>Department of Research, Meenakshi Academy of Higher Education and Research (MAHER-Deemed to be University), Chennai, Tamil Nadu, India</Affiliation>
        </Address>
        <Creatorrole corresponding="no" presenting="no">author</Creatorrole>
      </Creator>
      <Creator>
        <PersonNames>
          <Lastname>Behura</Lastname>
          <LastnameHeading>Behura</LastnameHeading>
          <Firstname>Shyam Sundar</Firstname>
          <Initials>SS</Initials>
        </PersonNames>
        <Address>
          <Affiliation>Department of Oral &#38; Maxillofacial Pathology, Kalinga Institute of Dental Sciences, Kalinga Institute of Industrial Technology (KIIT), Deemed to be University, Bhubaneswar, Odisha. India</Affiliation>
        </Address>
        <Creatorrole corresponding="no" presenting="no">author</Creatorrole>
      </Creator>
    </CreatorList>
    <PublisherList>
      <Publisher>
        <Corporation>
          <Corporatename>German Medical Science GMS Publishing House</Corporatename>
        </Corporation>
        <Address>D&#252;sseldorf</Address>
      </Publisher>
    </PublisherList>
    <SubjectGroup>
      <SubjectheadingDDB>610</SubjectheadingDDB>
      <Keyword language="en">oral mucosal lesions</Keyword>
      <Keyword language="en">dermatological disease</Keyword>
      <Keyword language="en">association</Keyword>
      <Keyword language="en">prevalence</Keyword>
      <Keyword language="de">L&#228;sionen der Mundschleimhaut</Keyword>
      <Keyword language="de">Hauterkrankungen</Keyword>
      <Keyword language="de">Assoziation</Keyword>
      <Keyword language="de">Pr&#228;valenz</Keyword>
    </SubjectGroup>
    <DatePublishedList>
      <DatePublished>20250617</DatePublished>
    </DatePublishedList>
    <Language>engl</Language>
    <License license-type="open-access" xlink:href="http://creativecommons.org/licenses/by/4.0/">
      <AltText language="en">This is an Open Access article distributed under the terms of the Creative Commons Attribution 4.0 License.</AltText>
      <AltText language="de">Dieser Artikel ist ein Open-Access-Artikel und steht unter den Lizenzbedingungen der Creative Commons Attribution 4.0 License (Namensnennung).</AltText>
    </License>
    <SourceGroup>
      <Journal>
        <ISSN>2196-5226</ISSN>
        <Volume>20</Volume>
        <JournalTitle>GMS Hygiene and Infection Control</JournalTitle>
        <JournalTitleAbbr>GMS Hyg Infect Control</JournalTitleAbbr>
      </Journal>
    </SourceGroup>
    <ArticleNo>31</ArticleNo>
  </MetaData>
  <OrigData>
    <Abstract language="de" linked="yes"><Pgraph><Mark1>Hintergrund:</Mark1> Die Mundh&#246;hle kann von einer Vielzahl von Erkrankungen betroffen sein, und viele systemische Erkrankungen haben ein breites Spektrum der Manifestation in der Mundh&#246;hle. L&#228;sionen der Mundschleimhaut k&#246;nnen fr&#252;he Hinweise der Manifestation oder das einzige Symptom der dermatologischen Erkrankungen sein, daher sollte jedes Symptom in der Mundh&#246;hle nicht vernachl&#228;ssigt werden.</Pgraph><Pgraph><Mark1>Methode:</Mark1> 1.131 Patienten, die sich wegen verschiedener dermatologischer Behandlungen vorstellten, wurden in die Studie aufgenommen. Die demografischen Daten wurden erhoben, und es wurde eine umfassende dermatologische Untersuchung durchgef&#252;hrt. Bei der Untersuchung der Mundh&#246;hle wurden die Gr&#246;&#223;e und die Stelle der L&#228;sion notiert. Die Ergebnisse wurden in SPSS Version 21 eingegeben und die deskriptive Statistik durchgef&#252;hrt (p&#60;0,05 wurde als statistisch signifikant betrachtet). </Pgraph><Pgraph><Mark1>Ergebnisse:</Mark1> 237 der 1.131 Patienten hatten parallel zu dermatologischen Symptomen L&#228;sionen der Mundschleimhaut. Psoriasis (44,3&#37;) war am h&#228;ufigsten von L&#228;sionen der Mundschleimhaut begleitet, gefolgt von Pemphigus (31,2&#37;) und bull&#246;sem Pemphigoid (10,1&#37;). Die h&#228;ufigste Lokalisation in der Mundh&#246;hle war der Gaumen (38,3&#37;).</Pgraph><Pgraph>Patienten in der Altersgruppe 25&#8211;50 Jahre (76&#37;) waren h&#228;ufiger betroffen als die anderen Altersgruppen. M&#228;nnliche (49,7&#37;) und weibliche (50,3&#37;) Patienten waren gleicherma&#223;en betroffen. </Pgraph><Pgraph><Mark1>Schlussfolgerung:</Mark1> Die Bedeutung der Diagnose oraler L&#228;sionen spielt in der dermatologischen Praxis und von mukokutanen L&#228;sionen in der zahn&#228;rztlichen Praxis eine zentrale Rolle bei der Behandlung. Das muss bei der Diagnose dieser F&#228;lle in der zahn&#228;rztlichen und dermatologischen Praxis entsprechend ber&#252;cksichtigt werden. </Pgraph></Abstract>
    <Abstract language="en" linked="yes"><Pgraph><Mark1>Background:</Mark1> The oral cavity can be affected by a variety of disorders, and many systemic disorders have wide range of manifestations in the oral cavity. Oral mucosal lesions can be early manifestations of the disease or the only symptom of dermatological diseases; therefore no symptom or sign in the oral cavity should be neglected. </Pgraph><Pgraph><Mark1>Materials and methods: </Mark1>1,131 patients who came to the Oral and Maxillofacial Pathology department for various dermatological treatments were included. The demographic details were obtained from each patient and a thorough dermatological examination was done. On examining the oral cavity, the size and the site of any lesions were noted. The results were entered in SPSS version 21 and descriptive statistics calculated (p&#60;0.05 was considered statistically significant).</Pgraph><Pgraph><Mark1>Results:</Mark1> Out of 1,131 patients, 237 patients had both with dermatological and oral mucosal lesions. Psoriasis (44.3&#37;) was most frequently accompanied by lesions of the oral mucosa, followed by pemphigus (31.2&#37;) and bullous pemphigoid (10.1&#37;). The most common site of involvement in the oral cavity was the palate (38.3&#37;). Patients in the age group of 25&#8211;50 years (76&#37;) were affected more than the other age groups. Male (49.7&#37;) and female (50.3&#37;) patients were equally affected. </Pgraph><Pgraph><Mark1>Conclusion:</Mark1> Diagnosing oral lesions in dermatology practice and mucocutaneous lesions in dental practice can play a pivotal role in patient management. Thus, comprehensive knowledge is necessary to diagnose these cases in dental and dermatology practice.</Pgraph></Abstract>
    <TextBlock name="Introduction" linked="yes">
      <MainHeadline>Introduction</MainHeadline><Pgraph>It is well known that oral health reflects overall health. This statement is also true in many cases of dermatological disorders where oral lesions occur along with or precede skin lesions. Dermatological diseases are systemic pathoses which, apart from the skin, manifest in other regions, e.g., the oral cavity, eyes, nails, and hair. This enables the dentist to observe the case well before systemic manifestations have occurred <TextLink reference="1"></TextLink>. Although the oral lesions are usually benign, progress of the dermatological component might negatively influence the patient&#8217;s quality of life. Early diagnosis and treatment benefit the patient. Most of the oral lesions that occur concurrently with dermatological disorders have been referred to as Oral Mucosal Lesions (OML) that manifests in various forms, such as patches, plaques, bullae, blisters or ulcers, to distinguish them from infections. Some of dermatological lesions are strongly associated with oral lesions and could be overlooked by dentists due to a lack of awareness <TextLink reference="2"></TextLink>. This study was done to find the prevalence of OML among patients who attended a tertiary dermatology clinic and determine possible correlations with their cutaneous counterparts.</Pgraph></TextBlock>
    <TextBlock name="Materials and methods" linked="yes">
      <MainHeadline>Materials and methods</MainHeadline><Pgraph>The study included patients treated for dermatological diseases. Demographic details were obtained from each patient and a thorough dermatological examination was done with histopathological confirmation. The study group was divided into age groups of 0-25 years, 26&#8211;50 years and 51&#8211;60 years. OML were assessed as abnormal changes such as swelling, plaque, fissures or a patch that are visible on the oral mucosa. While examining the oral cavity, the size and site of the lesion were noted. The lesions were histopathologically examined to confirm the diagnosis. The results were entered in SPSS version 21, and descriptive statistics were calculated, with statistical significance set at p&#60;0.05. The study procedure was explained to the patients in detail, and informed consent was subsequently obtained. Confidentiality of the patients was maintained. The participants were informed about their oral conditions, and health education was provided. Approval of the study was obtained from the Institutional Ethical Board, Institutional Review Board (IRB), and patient consent as per the IRB guidelines wase also obtained for each part of this study.</Pgraph></TextBlock>
    <TextBlock name="Results" linked="yes">
      <MainHeadline>Results</MainHeadline><Pgraph>1,131 patients with dermatological diseases were examined. Of these, 237 patients had both dermatological and OML. Patients were afflicted with pemphigus vulgaris, lichen planus, psoriasis, bullous pemphigoid, xeroderma pigmentosum, discoid lupus erythematosus, rhinophyma, vitiligo, erythema multiforme, lichenoid reaction, candidiasis, acanthosis nigricans and psoriasiform dermatitis associated with the respective cutaneous counterparts (Table 1 <ImgLink imgNo="1" imgType="table" />). The lesions were asymptomatic and were observed upon intraoral examination.</Pgraph><SubHeadline>Gender distribution</SubHeadline><Pgraph>Of the patients with dermatological diseases, 562 (49.7&#37;) were male and 569 (50.3&#37;) were female.No gender difference was found among patients with parallel OML (Table 2 <ImgLink imgNo="2" imgType="table" /> and Table 3 <ImgLink imgNo="3" imgType="table" />). </Pgraph><SubHeadline>Age dependency and symptoms</SubHeadline><Pgraph>In terms of psoriasis, pemphigus vulgaris and bullous pemphigoid, the majority of the patients belonged to the age group of 30&#8211;40 years. The major cutaneous manifestation of psoriasis was silvery keratotic scales. The most common clinical type of pemphigus vulgaris was reticular, and buccal mucosa was mostly involved, with more females affected. The skin lesions showed hypertrophic plaque form, and dystrophic nails were observed. Clinically, oral lesions precede skin lesions in many cases and appear as blisters which rupture rapidly, resulting in painful erosions.</Pgraph><Pgraph>One case of discoid lupus erythematosus was observe<TextGroup><PlainText>d a</PlainText></TextGroup>t a 72-year-old male patient. An ulcerative oral lesion was observed on the lips. The extra-oral manifestation was a butterfly-shaped malar rash and discoid rash, but no other systemic manifestations were seen. Histopathologically, the lesion was characterized by hyperparakeratosis, focal areas of liquefaction, and degeneration of the basal layer.</Pgraph><Pgraph>The oral manifestation of lichen planus was characterized by white striae and a streak or patch pattern in buccal mucosa.</Pgraph><SubHeadline>Site distribution of oral mucosal lesions</SubHeadline><Pgraph>21.5&#37; of the lesions were located on the buccal mucosa, 11.8&#37; were found on the gingiva, 38.4&#37; on the palate, 18.1&#37; onthe lips and 10.1&#37; were found involving the tongue. </Pgraph></TextBlock>
    <TextBlock name="Discussion" linked="yes">
      <MainHeadline>Discussion</MainHeadline><Pgraph>The study highlighted dermatological lesions that were associated with OML. OML may occur either before or after dermatological lesions and might have therapeutic consequences.</Pgraph><SubHeadline>Psoriasis</SubHeadline><Pgraph>According to Hern&#225;ndez-P&#233;rez et al. <TextLink reference="2"></TextLink>, oral lesions were found in 67.5&#37; of patients with psoriasis. This was similar to our finding, which showed 52 out of 105 cases of psoriasis had a strong positive correlation. Tomb et al. <TextLink reference="3"></TextLink> conducted a study on 400 psoriasis patients and 1,000 controls, revealing a significant correlation between psoriasis and fissured tongue (33.2&#37; vs. 9.9&#37;, P&#60;0.0001) and geographic tongue (7.7&#37; vs. 1&#37;, P&#60;0.0001). Notably, fissured tongue was highly prevalent in pustular psoriasis (83.3&#37; vs. 30&#37; in other forms). While these oral features are strongly associated with psoriasis, they are not pathognomonic. The prevalence of fissured tongue was higher than previously reported, and patients were often unaware of these signs. Hern&#225;ndez-P&#233;rez et al. <TextLink reference="2"></TextLink> and Tomb et al. <TextLink reference="3"></TextLink> suggest a strong association between psoriasis and oral lesions, particularly fissured and geographic tongue. However, these features are not pathognomonic, and many patients remain unaware of them. They also found a high incidence of HLA-DR7 in patients with psoriasis and EM, a finding that has not yet been explored in our population, highlighting the need for further research to understand its clinical significance.</Pgraph><SubHeadline>Pemphigus vulgaris (PV)</SubHeadline><Pgraph>Similar to our findings, Dagistan et al. <TextLink reference="4"></TextLink> stated that oral lesions were the first to manifest. Buccal mucosa, lips, and soft palate are most involved. As the oral cavity is subject to trauma during mastication, the thin roof of the blister ruptures easily and forms an erosion or ulcer in the area. As reported in the literature, our patients also presented with the two most common symptoms related to PV, that is, pain and burning sensation. Many cases of PV have been reported to begin as generalized lesions involving multiple intraoral sites, as in our case, in which the patient developed lesions on the buccal mucosa and tongue. While the buccal mucosa has been reported to be one of the most commonly affected sites, the tongue, which was also affected in our case, is a rare site for PV <TextLink reference="5"></TextLink>.</Pgraph><SubHeadline>Bullous pemphigoid</SubHeadline><Pgraph>All cases showed oral manifestations, which was similar to Budimir et al. <TextLink reference="6"></TextLink>, who had also reported oral lesions in all the cases of systemic cases of bullous pemphigoid. The oral manifestations initially started as bullae&#47;vesicles which ruptured, leaving a raw, eroded, ulcerative area. It involved the buccal mucosa, tongue and lips. Onset of bullae followed by rupture and leaving out painful ulcerations <TextLink reference="2"></TextLink>, <TextLink reference="6"></TextLink>. </Pgraph><SubHeadline>Discoid lupus erythematosus</SubHeadline><Pgraph>In our study, a single case (0.4&#37;) of discoid lupus erythematosus (DLE) was observed in a 72-year-old mal<TextGroup><PlainText>e, p</PlainText></TextGroup>resenting with an ulcerative oral lesion on the lips and extra-oral manifestations of a butterfly-shaped malar rash and discoid rash, without systemic involvement. Histopathological findings included hyperparakeratosis, focal liquefaction, and basal layer degeneration. Among 23 patients with DLE skin manifestations, only 1 (4.3&#37;) exhibite<TextGroup><PlainText>d b</PlainText></TextGroup>oth skin and oral involvement, indicating the rarity of oral lesions in DLE. Oral lesions may be present in each of two types of lupus erythematosus. Oral manifestation<TextGroup><PlainText>s of d</PlainText></TextGroup>iscoid lupus erythematosus are referred as &#8220;oral discoid lesions&#8221; and they occur in about 20&#37; of patients <TextLink reference="7"></TextLink>. These may occur without involvement of skin lesions or before the skin lesions develop. Oral discoid lesions most commonly occur on the labial mucosa, vermillion border and buccal mucosa.</Pgraph><Pgraph>Typical cases of oral discoid lesions are characterized clinically by the presence of white papules, centra<TextGroup><PlainText>l e</PlainText></TextGroup>rythema, a border zone of irradiating white striae and peripheral telangiectasia <TextLink reference="8"></TextLink>. This was similar to the findings of the study by Schmidt et al. <TextLink reference="9"></TextLink>, who also reported initial oral manifestation of this disorder.</Pgraph><SubHeadline>Lichen planus</SubHeadline><Pgraph>From our study population we found that lichen planus was observed in 18 patients (7&#37;), with a higher prevalence in males (66.7&#37;) compared to females (33.3&#37;). Among 78 patients with lichen planus having skin manifestations, only 18 (23&#37;) exhibited both skin and oral manifestations, indicating that oral involvement was less common. Oral manifestations of white striae&#47;streak or patch pattern in buccal mucosa were similar to the observations by Thete et al. <TextLink reference="10"></TextLink>.Those authors observed 1<TextGroup><PlainText>9 c</PlainText></TextGroup>ases of lichen planus, of which 7 lesions were plaque-like, 9 lesions exhibited papules, and 3 lesions had an ulcerated appearance; the sites involved included 17 buccal mucosa cases and 2 labial mucosa cases. This finding was in line with Eisen et al. <TextLink reference="11"></TextLink>, who stated that the disease manifests in the oral cavity several weeks before the skin lesions. About 15&#37; of oral lichen planus patients have concurrent skin lesions.</Pgraph><SubHeadline>Erythema multiforme</SubHeadline><Pgraph>In our study, one case of erythema multiforme was observed in a male patient, whereas Goncalves et al. <TextLink reference="12"></TextLink> found erythema multiforme (n&#61;21) mainly among women (62&#37;) between the ages of 20 and 40 years (48&#37;). Only 7 patients presented oral lesions, and of this number, 57&#37; reported a relation between the disease and viral infections, especially herpes simplex, 29&#37; reported a relation with drugs like Azathioprine, Thalidomide etc. which has the negative impacts such as blood in the urine or stool, unusual bruising, fatigue, development of mouth sores and ulcers, and 14&#37; did not mention any kind of relation. As for lesion type, 43&#37; presented ulcerated lesions on the buccal mucosa, followed by lips (43&#37;) and ulcerations in the tongue (24&#37;).</Pgraph><SubHeadline>Xeroderma pigmentosum</SubHeadline><Pgraph>In our study, xeroderma pigmentosum was observed in one female patient and not in any male patients. Whereas Wayli et al. <TextLink reference="13"></TextLink> reported an equal incidence in males and females with a history of consanguinity. Clinical symptoms usually manifest on regions exposed to sunlight. Individuals with XP develop cancer of the skin caused by exposure to mutational effects of radiant energy. Therefore, the disease is considered both hereditary and environmental; oral signs and symptoms of this disease are rare. Malignancies such as squamous cell carcinoma can develop on various parts of the oral mucosa but in our case, the patient did not have any signs of malignancy <TextLink reference="14"></TextLink>.</Pgraph><SubHeadline>Psoriasiform dermatitis</SubHeadline><Pgraph>Suliman et al. <TextLink reference="15"></TextLink> stated that the psoriasiform reaction pattern accounted for 56.7&#37;, whereas in our study <TextGroup><PlainText>9 c</PlainText></TextGroup>ases were observed, 3 in males and 6 in females. All cases showed oral manifestations. </Pgraph></TextBlock>
    <TextBlock name="Conclusion" linked="yes">
      <MainHeadline>Conclusion</MainHeadline><Pgraph>The oral cavity can be affected by various disorders, and many systemic diseases manifest through oral lesions or mucosal changes. Any symptom in the oral cavity should not be overlooked, as it may serve as an early indicator of an underlying disease. In this study, the number of patients with oral mucosal lesions in dermatological conditions was relatively low. However, the most notable finding was the frequent association of psoriasis with oral manifestations, followed by pemphigus and lichen planus. Histopathological findings support the diagnosis, with psoriasis-associated oral lesions showing parakeratosis and acanthosis, pemphigus lesions exhibiting intraepithelial clefting and acantholysis, and lichen planus characterized by lichenoid inflammation and basal layer degeneration. Recognizing such oral manifestations in dental and dermatological practice is crucial for early detection and management of these conditions.</Pgraph><Pgraph>The significance of diagnosing these oral lesions in dermatology practice and mucocutaneous lesions in dental practice plays a pivotal role in patient management. Thus, comprehensive knowledge is required to diagnose these cases in dental and dermatology practice, and such a multidisciplinary therapeutic approach will improve the patient&#8217;s prognosis. This study also shows that diagnosis and management of these oral lesions should also be carried out by oral clinicians in order to improve oral health functioning during the course of the disease. Intraoral examinations should be incorporated into routine dermatological examinations, as the oral manifestations can represent preliminary signs or can coexist with the diseases. The oral mucous membrane alone may be involved, but is very often overlooked by dermatologists, dentists, ENT specialists, and physicians. Primary health care providers should be able to manage such cases to quickly start appropriate interventions for the benefit of the patients, without delay or specialist consultations. Future studies need to focus on the size of the population suffering from a given disease, which may be useful to identify the statistical correlation between oral manifestations and dermatological diseases.</Pgraph></TextBlock>
    <TextBlock name="Notes" linked="yes">
      <MainHeadline>Notes</MainHeadline><SubHeadline>Ethical approval</SubHeadline><Pgraph>Institutional Ethical Board, Institutional Review Board (IRB) approval, patient consent as per the IRB guidelines were obtained for each part of this study.</Pgraph><SubHeadline>Funding</SubHeadline><Pgraph>None. </Pgraph><SubHeadline>Authors&#8217; ORCIDs </SubHeadline><Pgraph><UnorderedList><ListItem level="1">Ramiah V: <Hyperlink href="https:&#47;&#47;orcid.org&#47;0009-0009-1493-772X">https:&#47;&#47;orcid.org&#47;0009-0009-1493-772X</Hyperlink></ListItem><ListItem level="1">Sankar SL: <Hyperlink href="https:&#47;&#47;orcid.org&#47;0000-0002-5855-7974">https:&#47;&#47;orcid.org&#47;0000-0002-5855-7974</Hyperlink></ListItem><ListItem level="1">Shunmugavelu K: <Hyperlink href="https:&#47;&#47;orcid.org&#47;0000-0001-7562-8802">https:&#47;&#47;orcid.org&#47;0000-0001-7562-8802</Hyperlink></ListItem><ListItem level="1">Hussain ST: <Hyperlink href="https:&#47;&#47;orcid.org&#47;0000-0003-0028-0711">https:&#47;&#47;orcid.org&#47;0000-0003-0028-0711</Hyperlink></ListItem><ListItem level="1">Sadaisavam MP: <Hyperlink href="https:&#47;&#47;orcid.org&#47;0009-0005-8791-3009">https:&#47;&#47;orcid.org&#47;0009-0005-8791-3009</Hyperlink></ListItem><ListItem level="1">Behura SS: <Hyperlink href="https:&#47;&#47;orcid.org&#47;0000-0001-7281-0318">https:&#47;&#47;orcid.org&#47;0000-0001-7281-0318</Hyperlink></ListItem></UnorderedList></Pgraph><SubHeadline>Competing interests</SubHeadline><Pgraph>The authors declare that they have no competing interests.</Pgraph></TextBlock>
    <References linked="yes">
      <Reference refNo="1">
        <RefAuthor>Zucker J</RefAuthor>
        <RefAuthor>Mascr&#232;s C</RefAuthor>
        <RefAuthor>Charland R</RefAuthor>
        <RefTitle>Signes buccaux des maladies dermatologiques</RefTitle>
        <RefYear>1990</RefYear>
        <RefJournal>J Can Dent Assoc</RefJournal>
        <RefPage>867-71</RefPage>
        <RefTotal>Zucker J, Mascr&#232;s C, Charland R. Signes buccaux des maladies dermatologiques &#91;Oral manifestations of skin diseases&#93;. J Can Dent Assoc. 1990 Sep;56(9):867-71.</RefTotal>
      </Reference>
      <Reference refNo="2">
        <RefAuthor>Hern&#225;ndez-P&#233;rez F</RefAuthor>
        <RefAuthor>Jaimes-Avelda&#241;ez A</RefAuthor>
        <RefAuthor>Urquizo-Ruvalcaba Mde L</RefAuthor>
        <RefAuthor>D&#237;az-Barcelot M</RefAuthor>
        <RefAuthor>Irigoyen-Camacho ME</RefAuthor>
        <RefAuthor>Vega-Memije ME</RefAuthor>
        <RefAuthor>Mosqueda-Taylor A</RefAuthor>
        <RefTitle>Prevalence of oral lesions in patients with psoriasis</RefTitle>
        <RefYear>2008</RefYear>
        <RefJournal>Med Oral Patol Oral Cir Bucal</RefJournal>
        <RefPage>E703-8</RefPage>
        <RefTotal>Hern&#225;ndez-P&#233;rez F, Jaimes-Avelda&#241;ez A, Urquizo-Ruvalcaba Mde L, D&#237;az-Barcelot M, Irigoyen-Camacho ME, Vega-Memije ME, Mosqueda-Taylor A. Prevalence of oral lesions in patients with psoriasis. Med Oral Patol Oral Cir Bucal. 2008 Nov;13(11):E703-8.</RefTotal>
      </Reference>
      <Reference refNo="3">
        <RefAuthor>Tomb R</RefAuthor>
        <RefAuthor>Hajj H</RefAuthor>
        <RefAuthor>Nehme E</RefAuthor>
        <RefTitle>Manifestations buccales du psoriasis</RefTitle>
        <RefYear>2010</RefYear>
        <RefJournal>Ann Dermatol Venereol</RefJournal>
        <RefPage>695-702</RefPage>
        <RefTotal>Tomb R, Hajj H, Nehme E. Manifestations buccales du psoriasis &#91;Oral lesions in psoriasis&#93;. Ann Dermatol Venereol. 2010 Nov;137(11):695-702. DOI: 10.1016&#47;j.annder.2010.08.006</RefTotal>
        <RefLink>https:&#47;&#47;doi.org&#47;10.1016&#47;j.annder.2010.08.006</RefLink>
      </Reference>
      <Reference refNo="4">
        <RefAuthor>Dagistan S</RefAuthor>
        <RefAuthor>Goregen M</RefAuthor>
        <RefAuthor>Miloglu O</RefAuthor>
        <RefAuthor>Cakur B</RefAuthor>
        <RefTitle>Oral pemphigus vulgaris: a case report with review of the literature</RefTitle>
        <RefYear>2008</RefYear>
        <RefJournal>J Oral Sci</RefJournal>
        <RefPage>359-62</RefPage>
        <RefTotal>Dagistan S, Goregen M, Miloglu O, Cakur B. Oral pemphigus vulgaris: a case report with review of the literature. J Oral Sci. 2008 Sep;50(3):359-62. DOI: 10.2334&#47;josnusd.50.359</RefTotal>
        <RefLink>https:&#47;&#47;doi.org&#47;10.2334&#47;josnusd.50.359</RefLink>
      </Reference>
      <Reference refNo="5">
        <RefAuthor>Kuriachan D</RefAuthor>
        <RefAuthor>Suresh R</RefAuthor>
        <RefAuthor>Janardhanan M</RefAuthor>
        <RefAuthor>Savithri V</RefAuthor>
        <RefTitle>Oral Lesions: The Clue to Diagnosis of Pemphigus Vulgaris</RefTitle>
        <RefYear>2015</RefYear>
        <RefJournal>Case Rep Dent</RefJournal>
        <RefPage>593940</RefPage>
        <RefTotal>Kuriachan D, Suresh R, Janardhanan M, Savithri V. Oral Lesions: The Clue to Diagnosis of Pemphigus Vulgaris. Case Rep Dent. 2015;2015:593940. DOI: 10.1155&#47;2015&#47;593940</RefTotal>
        <RefLink>https:&#47;&#47;doi.org&#47;10.1155&#47;2015&#47;593940</RefLink>
      </Reference>
      <Reference refNo="6">
        <RefAuthor>Budimir J</RefAuthor>
        <RefAuthor>Mihi&#263; LL</RefAuthor>
        <RefAuthor>Situm M</RefAuthor>
        <RefAuthor>Bulat V</RefAuthor>
        <RefAuthor>Persi&#263; S</RefAuthor>
        <RefAuthor>Tomljanovi&#263;-Veselski M</RefAuthor>
        <RefTitle>Oral lesions in patients with pemphigus vulgaris and bullous pemphigoid</RefTitle>
        <RefYear>2008</RefYear>
        <RefJournal>Acta Clin Croat</RefJournal>
        <RefPage>13-8</RefPage>
        <RefTotal>Budimir J, Mihi&#263; LL, Situm M, Bulat V, Persi&#263; S, Tomljanovi&#263;-Veselski M. Oral lesions in patients with pemphigus vulgaris and bullous pemphigoid. Acta Clin Croat. 2008 Mar;47(1):13-8.</RefTotal>
      </Reference>
      <Reference refNo="7">
        <RefAuthor>Ranginwala AM</RefAuthor>
        <RefAuthor>Chalishazar MM</RefAuthor>
        <RefAuthor>Panja P</RefAuthor>
        <RefAuthor>Buddhdev KP</RefAuthor>
        <RefAuthor>Kale HM</RefAuthor>
        <RefTitle>Oral discoid lupus erythematosus: A study of twenty-one cases</RefTitle>
        <RefYear>2012</RefYear>
        <RefJournal>J Oral Maxillofac Pathol</RefJournal>
        <RefPage>368-73</RefPage>
        <RefTotal>Ranginwala AM, Chalishazar MM, Panja P, Buddhdev KP, Kale HM. Oral discoid lupus erythematosus: A study of twenty-one cases. J Oral Maxillofac Pathol. 2012 Sep;16(3):368-73. DOI: 10.4103&#47;0973-029X.102487</RefTotal>
        <RefLink>https:&#47;&#47;doi.org&#47;10.4103&#47;0973-029X.102487</RefLink>
      </Reference>
      <Reference refNo="8">
        <RefAuthor>Mustafa MB</RefAuthor>
        <RefAuthor>Porter SR</RefAuthor>
        <RefAuthor>Smoller BR</RefAuthor>
        <RefAuthor>Sitaru C</RefAuthor>
        <RefTitle>Oral mucosal manifestations of autoimmune skin diseases</RefTitle>
        <RefYear>2015</RefYear>
        <RefJournal>Autoimmun Rev</RefJournal>
        <RefPage>930-51</RefPage>
        <RefTotal>Mustafa MB, Porter SR, Smoller BR, Sitaru C. Oral mucosal manifestations of autoimmune skin diseases. Autoimmun Rev. 2015 Oct;14(10):930-51. DOI: 10.1016&#47;j.autrev.2015.06.005</RefTotal>
        <RefLink>https:&#47;&#47;doi.org&#47;10.1016&#47;j.autrev.2015.06.005</RefLink>
      </Reference>
      <Reference refNo="9">
        <RefAuthor>Schmidt M</RefAuthor>
        <RefAuthor>Pindborg JJ</RefAuthor>
        <RefTitle>Oral discoid lupus erythematosus. I. The validity of previous histopathologic diagnostic criteria</RefTitle>
        <RefYear>1984</RefYear>
        <RefJournal>Oral Surg Oral Med Oral Pathol</RefJournal>
        <RefPage>46-51</RefPage>
        <RefTotal>Schmidtt M, Pindborg JJ. Oral discoid lupus erythematosus. I. The validity of previous histopathologic diagnostic criteria. Oral Surg Oral Med Oral Pathol. 1984 Jan;57(1):46-51. DOI: 10.1016&#47;0030-4220(84)90259-7</RefTotal>
        <RefLink>https:&#47;&#47;doi.org&#47;10.1016&#47;0030-4220(84)90259-7</RefLink>
      </Reference>
      <Reference refNo="10">
        <RefAuthor>Thete SG</RefAuthor>
        <RefAuthor>Kulkarni M</RefAuthor>
        <RefAuthor>Nikam AP</RefAuthor>
        <RefAuthor>Mantri T</RefAuthor>
        <RefAuthor>Umbare D</RefAuthor>
        <RefAuthor>Satdive S</RefAuthor>
        <RefAuthor>Kulkarni D</RefAuthor>
        <RefTitle>Oral Manifestation in Patients diagnosed with Dermatological Diseases</RefTitle>
        <RefYear>2017</RefYear>
        <RefJournal>J Contemp Dent Pract</RefJournal>
        <RefPage>1153-8</RefPage>
        <RefTotal>Thete SG, Kulkarni M, Nikam AP, Mantri T, Umbare D, Satdive S, Kulkarni D. Oral Manifestation in Patients diagnosed with Dermatological Diseases. J Contemp Dent Pract. 2017 Dec;18(12):1153-8. DOI: 10.5005&#47;jp-journals-10024-2191</RefTotal>
        <RefLink>https:&#47;&#47;doi.org&#47;10.5005&#47;jp-journals-10024-2191</RefLink>
      </Reference>
      <Reference refNo="11">
        <RefAuthor>Eisen D</RefAuthor>
        <RefTitle>The evaluation of cutaneous, genital, scalp, nail, esophageal, and ocular involvement in patients with oral lichen planus</RefTitle>
        <RefYear>1999</RefYear>
        <RefJournal>Oral Surg Oral Med Oral Pathol Oral Radiol Endod</RefJournal>
        <RefPage>431-6</RefPage>
        <RefTotal>Eisen D. The evaluation of cutaneous, genital, scalp, nail, esophageal, and ocular involvement in patients with oral lichen planus. Oral Surg Oral Med Oral Pathol Oral Radiol Endod. 1999 Oct;88(4):431-6. DOI: 10.1016&#47;s1079-2104(99)70057-0</RefTotal>
        <RefLink>https:&#47;&#47;doi.org&#47;10.1016&#47;s1079-2104(99)70057-0</RefLink>
      </Reference>
      <Reference refNo="12">
        <RefAuthor>Gon&#231;alves LM</RefAuthor>
        <RefAuthor>Bezerra J&#250;nior JR</RefAuthor>
        <RefAuthor>Cruz MC</RefAuthor>
        <RefTitle>Clinical evaluation of oral lesions associated with dermatologic diseases</RefTitle>
        <RefYear>2010</RefYear>
        <RefJournal>An Bras Dermatol</RefJournal>
        <RefPage>150-6</RefPage>
        <RefTotal>Gon&#231;alves LM, Bezerra J&#250;nior JR, Cruz MC. Clinical evaluation of oral lesions associated with dermatologic diseases. An Bras Dermatol. 2010;85(2):150-6. DOI: 10.1590&#47;s0365-05962010000200004</RefTotal>
        <RefLink>https:&#47;&#47;doi.org&#47;10.1590&#47;s0365-05962010000200004</RefLink>
      </Reference>
      <Reference refNo="13">
        <RefAuthor>Al Wayli H</RefAuthor>
        <RefTitle>Xeroderma pigmentosum and its dental implications</RefTitle>
        <RefYear>2015</RefYear>
        <RefJournal>Eur J Dent</RefJournal>
        <RefPage>145-8</RefPage>
        <RefTotal>Al Wayli H. Xeroderma pigmentosum and its dental implications. Eur J Dent. 2015;9(1):145-8. DOI: 10.4103&#47;1305-7456.149664</RefTotal>
        <RefLink>https:&#47;&#47;doi.org&#47;10.4103&#47;1305-7456.149664</RefLink>
      </Reference>
      <Reference refNo="14">
        <RefAuthor>Patton LL</RefAuthor>
        <RefAuthor>Valdez IH</RefAuthor>
        <RefTitle>Xeroderma pigmentosum: review and report of a case</RefTitle>
        <RefYear>1991</RefYear>
        <RefJournal>Oral Surg Oral Med Oral Pathol</RefJournal>
        <RefPage>297-300</RefPage>
        <RefTotal>Patton LL, Valdez IH. Xeroderma pigmentosum: review and report of a case. Oral Surg Oral Med Oral Pathol. 1991 Mar;71(3):297-300. DOI: 10.1016&#47;0030-4220(91)90303-t</RefTotal>
        <RefLink>https:&#47;&#47;doi.org&#47;10.1016&#47;0030-4220(91)90303-t</RefLink>
      </Reference>
      <Reference refNo="15">
        <RefAuthor>Suliman NM</RefAuthor>
        <RefAuthor>Astr&#248;m AN</RefAuthor>
        <RefAuthor>Ali RW</RefAuthor>
        <RefAuthor>Salman H</RefAuthor>
        <RefAuthor>Johannessen AC</RefAuthor>
        <RefTitle>Oral mucosal lesions in skin diseased patients attending a dermatologic clinic: a cross-sectional study in Sudan</RefTitle>
        <RefYear>2011</RefYear>
        <RefJournal>BMC Oral Health</RefJournal>
        <RefPage>24</RefPage>
        <RefTotal>Suliman NM, Astr&#248;m AN, Ali RW, Salman H, Johannessen AC. Oral mucosal lesions in skin diseased patients attending a dermatologic clinic: a cross-sectional study in Sudan. BMC Oral Health. 2011 Sep;11:24. DOI: 10.1186&#47;1472-6831-11-24</RefTotal>
        <RefLink>https:&#47;&#47;doi.org&#47;10.1186&#47;1472-6831-11-24</RefLink>
      </Reference>
    </References>
    <Media>
      <Tables>
        <Table format="png">
          <MediaNo>1</MediaNo>
          <MediaID>1</MediaID>
          <Caption><Pgraph><Mark1>Table 1: Percentage of oral mucosal lesions with various dermatological lesions</Mark1></Pgraph></Caption>
        </Table>
        <Table format="png">
          <MediaNo>2</MediaNo>
          <MediaID>2</MediaID>
          <Caption><Pgraph><Mark1>Table 2: Gender distribution of dermatological diseases with oral mucosal lesions in the study population</Mark1></Pgraph></Caption>
        </Table>
        <Table format="png">
          <MediaNo>3</MediaNo>
          <MediaID>3</MediaID>
          <Caption><Pgraph><Mark1>Table 3: Gender distribution of oral mucosal lesions broken down into dermatological disease</Mark1></Pgraph></Caption>
        </Table>
        <NoOfTables>3</NoOfTables>
      </Tables>
      <Figures>
        <NoOfPictures>0</NoOfPictures>
      </Figures>
      <InlineFigures>
        <NoOfPictures>0</NoOfPictures>
      </InlineFigures>
      <Attachments>
        <NoOfAttachments>0</NoOfAttachments>
      </Attachments>
    </Media>
  </OrigData>
</GmsArticle>