oncocytoma /on·co·cy·to·ma/ (ong″ko-si-to´mah)
oncocytoma (ong´kōsītō´m
),
oncocytoma
1. a usually benign adenoma composed of oncocytes with granular, eosinophilic cytoplasm.
2. a benign Hürthle cell tumor.
renal oncocytoma a benign neoplasm of the kidney resembling a renal cell carcinoma but encapsulated and not invasive.
on·co·cy·to·ma ( ng k -s -t m )n. pl. on·co·cy·to·mas or on·co·cy·to·ma·ta (-m -t) A glandular tumor that is chiefly composed of oncocytes, occurring most often in the salivary glands. |
oncocytoma (ong´kōsītō´m
),n a rare, benign tumor usually occurring in the parotid glands in older patients. The lesion is encapsulated and composed of sheets and cords of large eosinophilic cells with small nuclei. Also called
acidophilic adenoma, oxyphilic adenoma.
acidophilic adenoma, oxyphilic adenoma.
)
Oncocytoma.
oncocytoma
a rare benign neoplasm arising from oncocytes.
oncocytoma
A usually benign tumor characterized by aggregates of bland pink cells Locations Bronchial, lacrimal, salivary, parathyroid, and thyroid glands–Hürthle cell adenoma, anterior pituitary, kidney; rarely, malignant
oncocytomas occur in salivary glands, nasal cavity, paranasal sinuses, mediastinum and thyroid and kidneys DiffDx Oncocytic CA of pancreas, oncocytic carcinoid of lungs, clinically similar to 'garden variety' carcinoid, oncocytosis of
salivary gland, an age-related hyperplasia
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