Difference between revisions of "Myoepithelial carcinoma"
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==General== | ==General== | ||
*Rare. | *Rare. | ||
*Often misdiagnosed as "benign".<ref name=pmid30789358> | *Often misdiagnosed as "benign".<ref name=pmid30789358/> | ||
==Microscopic== | ==Microscopic== | ||
Revision as of 01:45, 19 March 2019
Myoepithelial carcinoma, abbreviated MECA a rare malignant salivary gland tumour.[1] It is the malignant counterpart of myoepithelioma.
General
- Rare.
- Often misdiagnosed as "benign".[2]
Microscopic
Features:[2]
- Myoepithelial cells - may be cytologically very bland.
- Hypocellular centre (hyaline or myxoid) and hypercellular periphery.
- Pushing border ("expansile nodular lobulated pattern").
- No ductal structures.
Note:
- Overt features of malignancy (necrosis, nuclear atypia, infiltrative growth, proliferation) absent.
DDx:
IHC
- CAM5.2 +ve.
Molecular
See also
References
- ↑ Kong, M.; Drill, EN.; Morris, L.; West, L.; Klimstra, D.; Gonen, M.; Ghossein, R.; Katabi, N. (Jul 2015). "Prognostic factors in myoepithelial carcinoma of salivary glands: a clinicopathologic study of 48 cases.". Am J Surg Pathol 39 (7): 931-8. doi:10.1097/PAS.0000000000000452. PMID 25970687.
- ↑ 2.0 2.1 Xu, B.; Mneimneh, W.; Torrence, DE.; Higgins, K.; Klimstra, D.; Ghossein, R.; Katabi, N. (Feb 2019). "Misinterpreted Myoepithelial Carcinoma of Salivary Gland: A Challenging and Potentially Significant Pitfall.". Am J Surg Pathol. doi:10.1097/PAS.0000000000001218. PMID 30789358.
- ↑ Dalin, MG.; Katabi, N.; Persson, M.; Lee, KW.; Makarov, V.; Desrichard, A.; Walsh, LA.; West, L. et al. (10 2017). "Multi-dimensional genomic analysis of myoepithelial carcinoma identifies prevalent oncogenic gene fusions.". Nat Commun 8 (1): 1197. doi:10.1038/s41467-017-01178-z. PMID 29084941.
- ↑ Thway, K.; Bown, N.; Miah, A.; Turner, R.; Fisher, C. (Jun 2015). "Rhabdoid Variant of Myoepithelial Carcinoma, with EWSR1 Rearrangement: Expanding the Spectrum of EWSR1-Rearranged Myoepithelial Tumors.". Head Neck Pathol 9 (2): 273-9. doi:10.1007/s12105-014-0556-2. PMID 24993038.