Epithelioid Cell Histiocytoma



Epithelioid Cell Histiocytoma


David Cassarino, MD, PhD










Low magnification of an epithelioid histiocytoma shows a nodular, dermal-based tumor surrounded by an epidermal collarette image. Note the prominent superficial blood vessels with telangiectasia image.






Higher magnification of epithelioid histiocytoma shows a proliferation of moderately enlarged, epithelioidappearing cells with eosinophilic cytoplasm and oval to angulated, hyperchromatic nuclei.


TERMINOLOGY


Abbreviations



  • Epithelioid cell histiocytoma (ECH)


Synonyms



  • Epithelioid histiocytoma variant of dermatofibroma


Definitions



  • Dermal-based benign fibrohistiocytic tumor, which can mimic melanocytic, vascular, epithelial, or other histiocytic lesions


ETIOLOGY/PATHOGENESIS


Unknown



  • May arise from activated dermal dendrocytes

Jul 8, 2016 | Posted by in PATHOLOGY & LABORATORY MEDICINE | Comments Off on Epithelioid Cell Histiocytoma
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