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Τετάρτη 4 Απριλίου 2018

Expanding the Histomorphologic Spectrum of TFE3 Rearranged PEComas

Perivascular epithelioid tumors (PEComas) are a family of mesenchymal neoplasms that have smooth muscle and melanocytic differentiation. They can be sporadic or associated with Tuberous Sclerosis Complex and commonly present in the kidney as angiomyolipoma or in the lung as pulmonary clear cell sugar tumors or lymphangioleiomyomatosis. However, they can present at any visceral or soft tissue site. They usually have a benign clinical course, but rarely can behave in a malignant fashion. Most PEComas demonstrate abnormalities of TSC2, but a recently described subset harbor TFE3 rearrangements that appear to be mutually exclusive of TSC2 alterations.

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