Clear Cell Myoepithelioma of Palate with Emphasis on Clinical and Histological Differential Diagnosis
Identifieur interne : 000139 ( Pmc/Curation ); précédent : 000138; suivant : 000140Clear Cell Myoepithelioma of Palate with Emphasis on Clinical and Histological Differential Diagnosis
Auteurs : Bindu J. Nair [Inde] ; Velayudhannair Vivek [Inde] ; Trivandrum T. Sivakumar [Inde] ; Anna P. Joseph [Inde] ; Babyamma Raghavanpillai Varun [Inde] ; Vinod Mony [Inde]Source :
- Clinics and Practice [ 2039-7275 ] ; 2014.
Abstract
Myoepitheliomas account for less than 1% of all salivary gland tumors and mostly occur in the parotid gland and palate. A 58-year old male patient reported to the Outpatient Department of PMS College of Dental Science and Research (Kerala, India) with a slow growing painless swelling on the palate for 4 years. Pleomorphic adenoma, basal cell adenoma, myoepithelioma, cyst adenoma, lipoma, neurofibroma, neurilemmoma and leiomyoma were considered. Histopathology revealed a thinly encapsulated tumor composed mainly of sheets of clear cells mixed with cells having eosinophilic cytoplasm. Histopathological differential diagnosis included pleomorphic adenoma, oncocytoma, oncocytic hyperplasia, sebaceous adenoma, malignant salivary gland neoplasms and metastatic lesions from kidney and thyroid. Myoepitheliomas mostly occur in the parotid gland and palatal region and various histological types of myoepithelioma are described. Myoepitheliomas of the palate are rare with clear cell variant even rarer.
Url:
DOI: 10.4081/cp.2014.628
PubMed: 24847433
PubMed Central: 4019922
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<front><div type="abstract" xml:lang="en"><p>Myoepitheliomas account for less than 1% of all salivary gland tumors and mostly occur in the parotid gland and palate. A 58-year old male patient reported to the Outpatient Department of PMS College of Dental Science and Research (Kerala, India) with a slow growing painless swelling on the palate for 4 years. Pleomorphic adenoma, basal cell adenoma, myoepithelioma, cyst adenoma, lipoma, neurofibroma, neurilemmoma and leiomyoma were considered. Histopathology revealed a thinly encapsulated tumor composed mainly of sheets of clear cells mixed with cells having eosinophilic cytoplasm. Histopathological differential diagnosis included pleomorphic adenoma, oncocytoma, oncocytic hyperplasia, sebaceous adenoma, malignant salivary gland neoplasms and metastatic lesions from kidney and thyroid. Myoepitheliomas mostly occur in the parotid gland and palatal region and various histological types of myoepithelioma are described. Myoepitheliomas of the palate are rare with clear cell variant even rarer.</p>
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<front><journal-meta><journal-id journal-id-type="nlm-ta">Clin Pract</journal-id>
<journal-id journal-id-type="iso-abbrev">Clin Pract</journal-id>
<journal-id journal-id-type="publisher-id">CP</journal-id>
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<issn pub-type="ppub">2039-7275</issn>
<issn pub-type="epub">2039-7283</issn>
<publisher><publisher-name>PAGEPress Publications, Pavia, Italy</publisher-name>
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<article-id pub-id-type="pmc">4019922</article-id>
<article-id pub-id-type="doi">10.4081/cp.2014.628</article-id>
<article-categories><subj-group subj-group-type="heading"><subject>Case Report</subject>
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<title-group><article-title>Clear Cell Myoepithelioma of Palate with Emphasis on Clinical and Histological Differential Diagnosis</article-title>
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<contrib-group><contrib contrib-type="author"><name><surname>Nair</surname>
<given-names>Bindu J.</given-names>
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<xref ref-type="aff" rid="aff001"><sup>1</sup>
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<contrib contrib-type="author"><name><surname>Vivek</surname>
<given-names>Velayudhannair</given-names>
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<xref ref-type="aff" rid="aff002"><sup>2</sup>
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<contrib contrib-type="author"><name><surname>Sivakumar</surname>
<given-names>Trivandrum T.</given-names>
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<xref ref-type="aff" rid="aff001"><sup>1</sup>
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<contrib contrib-type="author"><name><surname>Joseph</surname>
<given-names>Anna P.</given-names>
</name>
<xref ref-type="aff" rid="aff001"><sup>1</sup>
</xref>
</contrib>
<contrib contrib-type="author"><name><surname>Varun</surname>
<given-names>Babyamma Raghavanpillai</given-names>
</name>
<xref ref-type="aff" rid="aff001"><sup>1</sup>
</xref>
</contrib>
<contrib contrib-type="author"><name><surname>Mony</surname>
<given-names>Vinod</given-names>
</name>
<xref ref-type="aff" rid="aff001"><sup>1</sup>
</xref>
</contrib>
</contrib-group>
<aff id="aff001"><label>1</label>
Department of Oral Pathology and Microbiology,<institution>PMS College of Dental Science and Research</institution>
,<addr-line>Kerala, India</addr-line>
</aff>
<aff id="aff002"><label>2</label>
Department of Oral Medicine and Radiology,<institution>PMS College of Dental Science and Research</institution>
,<addr-line>Kerala, India</addr-line>
</aff>
<author-notes><corresp id="cor1">Department of Oral Pathology and Microbiology, PMS College of Dental Science and Research, Golden Hills, Vattapara, Thiruvananthapuram, Kerala, India. <phone>+91.9495243010</phone>
- <fax>+91.0472.2587874</fax>
. <email>nair.binduj@gmail.com</email>
</corresp>
<fn fn-type="con"><p>Contributions: BJN, histopathological diagnosis and conception, design and writing of manuscript; VV, clinical examination and clinical photograph; TTS, assisting in diagnosis; APJ, collection of articles; BRV, preparation of histopathological slides; VM, photomicrographs.</p>
</fn>
<fn fn-type="conflict"><p>Conflict of interests: the authors declare no potential conflict of interests.</p>
</fn>
</author-notes>
<pub-date pub-type="epub"><day>07</day>
<month>5</month>
<year>2014</year>
</pub-date>
<pub-date pub-type="collection"><day>27</day>
<month>3</month>
<year>2014</year>
</pub-date>
<volume>4</volume>
<issue>1</issue>
<elocation-id>628</elocation-id>
<history><date date-type="received"><day>31</day>
<month>12</month>
<year>2013</year>
</date>
<date date-type="rev-recd"><day>02</day>
<month>4</month>
<year>2014</year>
</date>
<date date-type="accepted"><day>11</day>
<month>4</month>
<year>2014</year>
</date>
</history>
<permissions><copyright-statement>©Copyright B.J. Nair et al.</copyright-statement>
<copyright-year>2014</copyright-year>
<copyright-holder>Licensee PAGEPress, Italy</copyright-holder>
<license license-type="open-access" xlink:href="http://creativecommons.org/licenses/by-nc/3.0/"><license-p>This work is licensed under a Creative Commons Attribution NonCommercial 3.0 License (<uri xlink:href="http://creativecommons.org/licenses/by-nc/3.0/">CC BYNC 3.0</uri>
)</license-p>
</license>
</permissions>
<abstract><p>Myoepitheliomas account for less than 1% of all salivary gland tumors and mostly occur in the parotid gland and palate. A 58-year old male patient reported to the Outpatient Department of PMS College of Dental Science and Research (Kerala, India) with a slow growing painless swelling on the palate for 4 years. Pleomorphic adenoma, basal cell adenoma, myoepithelioma, cyst adenoma, lipoma, neurofibroma, neurilemmoma and leiomyoma were considered. Histopathology revealed a thinly encapsulated tumor composed mainly of sheets of clear cells mixed with cells having eosinophilic cytoplasm. Histopathological differential diagnosis included pleomorphic adenoma, oncocytoma, oncocytic hyperplasia, sebaceous adenoma, malignant salivary gland neoplasms and metastatic lesions from kidney and thyroid. Myoepitheliomas mostly occur in the parotid gland and palatal region and various histological types of myoepithelioma are described. Myoepitheliomas of the palate are rare with clear cell variant even rarer.</p>
</abstract>
<kwd-group><title>Key words</title>
<kwd>myoepithelioma</kwd>
<kwd>soft tissue neoplasms</kwd>
<kwd>salivary gland</kwd>
<kwd>palate</kwd>
</kwd-group>
<counts><fig-count count="8"></fig-count>
<table-count count="0"></table-count>
<equation-count count="0"></equation-count>
<ref-count count="33"></ref-count>
<page-count count="5"></page-count>
</counts>
</article-meta>
</front>
<floats-group><fig id="fig001" orientation="portrait" position="float"><label>Figure 1.</label>
<caption><p>Myoepithelioma presenting as a palatal swelling.</p>
</caption>
<graphic xlink:href="cp-2014-1-628-g001"></graphic>
</fig>
<fig id="fig002" orientation="portrait" position="float"><label>Figure 2.</label>
<caption><p>Tumor showing clear cells, eosinophilic cells and hyalinized septae (H&E staining, 100X).</p>
</caption>
<graphic xlink:href="cp-2014-1-628-g002"></graphic>
</fig>
<fig id="fig003" orientation="portrait" position="float"><label>Figure 3.</label>
<caption><p>Tumor cells (H&E staining, 400X).</p>
</caption>
<graphic xlink:href="cp-2014-1-628-g003"></graphic>
</fig>
<fig id="fig004" orientation="portrait" position="float"><label>Figure 4.</label>
<caption><p>Tumor cells (H&E staining, 1000X).</p>
</caption>
<graphic xlink:href="cp-2014-1-628-g004"></graphic>
</fig>
<fig id="fig005" orientation="portrait" position="float"><label>Figure 5.</label>
<caption><p>Tumor mass with the capsule (H&E staining, 400X).</p>
</caption>
<graphic xlink:href="cp-2014-1-628-g005"></graphic>
</fig>
<fig id="fig006" orientation="portrait" position="float"><label>Figure 6.</label>
<caption><p>Immunohistochemical stain pan cytokeratin (400X).</p>
</caption>
<graphic xlink:href="cp-2014-1-628-g006"></graphic>
</fig>
<fig id="fig007" orientation="portrait" position="float"><label>Figure 7.</label>
<caption><p>Immunohistochemical stain S100 (400X).</p>
</caption>
<graphic xlink:href="cp-2014-1-628-g007"></graphic>
</fig>
<fig id="fig008" orientation="portrait" position="float"><label>Figure 8.</label>
<caption><p>Immunohistochemical stain smooth muscle actin (400X).</p>
</caption>
<graphic xlink:href="cp-2014-1-628-g008"></graphic>
</fig>
</floats-group>
</pmc>
</record>
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