Myoepithelioma of the head and neck

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Myoepithelioma of the head and neck
Myoepithelioma - very high mag.jpg
Micrograph of a myoepithelioma. H&E stain.
Classification and external resources

Myoepithelioma of the head and neck, also myoepithelioma, is a salivary gland tumour of the head and neck that is usually benign.[1]

As the name suggests, it consists of myoepithelial cells. Classically, they are found in the parotid gland or palate.[1] A similar tumor type may be found in the tongue, referred to as ectomesenchymal chondromyxoid tumor.

Diagnosis[edit]

Myoepitheliomas are diagnosed from an examination of the tissue by a pathologist.

Pathology[edit]

The myoepithelial cells may be spindled, plasmacytoid, eithelioid or clear. Tubules or epithelium are absent, or present in a small amount (<5%) by definition. Tumours with myoepithelial cells and a large amount of tubules are classified as pleomorphic adenomas (which must also contain the characteristic chondromyxoid stroma, which is normally absent in myoepithelioma).

Treatment[edit]

Benign myoepithelioma are treated with simple excision. They are less prone to recurrence than pleomorphic adenoma.

See also[edit]

Additional images[edit]

References[edit]

  1. ^ a b Barnes, L.; Appel, BN.; Perez, H.; El-Attar, AM. (Jan 1985). "Myoepithelioma of the head and neck: case report and review.". J Surg Oncol. 28 (1): 21–8. doi:10.1002/jso.2930280107. PMID 2982059. 
  2. ^ Smith BC, Ellis GL, Meis-Kindblom JM, Williams SB (May 1995). "Ectomesenchymal chondromyxoid tumor of the anterior tongue. Nineteen cases of a new clinicopathologic entity". Am J Surg Pathol. 19: 519–30. doi:10.1097/00000478-199505000-00003. PMID 7726361.