epithelioid cell


Also found in: Dictionary, Thesaurus, Medical, Legal, Financial, Wikipedia.
Related to epithelioid cell: giant cell

epithelioid cell

[‚ep·ə′thē·lē‚ȯid ‚sel]
(histology)
A macrophage that resembles an epithelial cell. Also known as alveolated cell.
References in periodicals archive ?
Perivascular epithelioid cell tumors (PEComas) of the kidney are a group of tumor family covering classical angiomyolipoma (AML), microscopic AML (microhamartoma), intraglomerular lesions, cystic AML, epithelioid AML, oncocytoma-like AML and lymphangiomyomatosis of the renal sinus.
The epithelioid cells in both human tuberculosis and sarcoidosis are also 'primarily biosynthetic rather than phagocytic'.
4) The following histological features are predictive of malignancy in AML: >70% atypical epithelioid cells, >2 mitotic figures per 10 high-power field (HPF), atypical mitotic figures, and necrosis.
Specific lesions are characterized by the presence of granulomas of epithelioid cells without necrosis on biopsy specimens.
10] About 20%-30% of tumors are predominantly composed of large-round or polygonal epithelioid cells with abundant eosinophilic to clear cytoplasm.
Granulomatous lesions of the oral cavity present histopathologically as non-caseating epithelioid cell granulomas.
Fine needle aspiration cytology smears of greater auricular nerve: (a) and (b) showing multiple epithelioid cell granulomas admixed with mature lymphocytes (Hematoxylin and eosin stain, 400x) (c) Multinucleated giant cells (Hematoxylin and eosin stain, 400x) (d) Lepra bacilli (arrow) stained positive (Modified Ziehl-Neelsen, Oil immersion).
The biopsy report was extensive non- caseating naked epithelioid cell granulomas with no LT bodies and PAS stain negative for fungi" (Figure 2).
Both tuberculosis and sarcoidosis are granulomatous diseases, however, tuberculosis has a caseating granuloma as opposed to sarcoidosis, which present with non-caseating epithelioid cell granuloma.
3) The term PEComa, as an acronym for perivascular epithelioid cell tumor, was first introduced in 1996 by Zamboni et al, (4) who used it to describe a pancreatic tumor composed of human melanoma black 45 (HMB-45)-positive clear epithelioid cells.
Group-1: Epithelioid cell clusters with or without Langhan's giant cells without necrotic material