Myoepithelioma
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Myoepitheliomas and malignant myoepitheliomas were considered a variant of pleomorphic adenomas until 1991. However, these are also found in breast and bronchus and have gained recognition as separate entities. They account for less than 1% of salivary gland tumours, only rarely undergo malignant transformation (0.2-0.45% of all malignant salivary gland tumours).
Age of presentation ranges from 20-60 years of age, and parotid gland, and and accessory salivary glands are the main sitesites of occurrence.
Imaging appearance is essentially the same ofas pleomorphic adenomas.
-<p><strong>Myoepitheliomas </strong>and malignant myoepitheliomas were considered a variant of <a href="/articles/pleomorphic-adenoma">pleomorphic adenomas</a> until 1991. However, these are also found in <a href="/articles/breast">breast</a> and <a href="/articles/bronchus">bronchus</a> and have gained recognition as separate entities. They account for less than 1% of <a href="/articles/salivary-gland-tumours">salivary gland tumours</a>, only rarely undergo malignant transformation (0.2-0.45% of all malignant salivary gland tumours).</p><p>Age of presentation ranges from 20-60 years of age, and <a href="/articles/parotid-gland">parotid gland</a>, and <a href="/articles/accessory-salivary-glands">accessory salivary glands</a> are the main site of occurrence.</p><p>Imaging appearance is essentially the same of pleomorphic adenomas.</p>- +<p><strong>Myoepitheliomas </strong>and malignant myoepitheliomas were considered a variant of <a href="/articles/pleomorphic-adenoma-of-the-salivary-glands">pleomorphic adenomas</a> until 1991. However, these are also found in <a href="/articles/breast">breast</a> and <a href="/articles/bronchus">bronchus</a> and have gained recognition as separate entities. They account for less than 1% of <a href="/articles/salivary-gland-tumours">salivary gland tumours</a>, only rarely undergo malignant transformation (0.2-0.45% of all malignant salivary gland tumours).</p><p>Age of presentation ranges from 20-60 years of age, and <a href="/articles/parotid-gland">parotid gland</a> and <a href="/articles/accessory-salivary-glands">accessory salivary glands</a> are the main sites of occurrence.</p><p>Imaging appearance is essentially the same as pleomorphic adenomas.</p>
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