oncocytoma

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on·co·cy·to·ma

(ong'kō-sī-tō'mă), [MIM*553000]
A glandular tumor composed of large cells with cytoplasm that is granular and eosinophilic because of the presence of abundant mitochondria; occurs uncommonly in the kidney, salivary glands, and endocrine glands.
Synonym(s): oxyphil adenoma
[onco- + G. kytos, cell, + -oma, tumor]

oncocytoma

/on·co·cy·to·ma/ (ong″ko-si-to´mah)
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.

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

on·co·cy·to·ma

(ong'kō-sī-tō'mă) [MIM*553000]
A glandular tumor composed of large cells with cytoplasm that is granular and eosinophilic because of the presence of abundant mitochondria; occurs uncommonly in the kidney and salivary and endocrine glands.

oncocytoma (ong´kōsītō´mə),

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.
Enlarge picture
Oncocytoma.

oncocytoma

a rare benign neoplasm arising from oncocytes.
References in periodicals archive ?
Traditionally, the standard treatment for renal oncocytoma has been surgical excision by radical nephrectomy.
The presence of variegated cytoplasm and frequent perinuclear clearing in ChRCC and presence of uniform large cells with abundant homogeneous granular cytoplasm, lacking perinuclear clearing, and nuclear membrane irregularities, helps in distinction from renal oncocytoma (1,2,6,7,9,11,12).
Immunohistochemical analysis of chromophobe renal cell carcinoma, renal oncocytoma, and clear cell carcinoma: an optimal and practical panel for differential diagnosis.
Expression of kidney-specific cadherin in chromophobe renal cell carcinoma and renal oncocytoma.
Combined late gadolinium-enhanced and double-echo chemical-shift MRI help to differentiate renal oncocytomas with high central T2 signal intensity from renal cell carcinomas.
C-kit expression in renal oncocytomas and chromophobe renal cell carcinomas.
Renal oncocytoma nuclei are typically single, although binucleation can be seen, and they are centrally located and have regular nuclear membranes and absent to prominent nucleoli (Figure 3, C and F).
Renal oncocytoma, first described by Zippel in 1942, is a relatively non-frequent neoplasms arising from intercalating cells of the cortical collecting ducts.
Claudin-7 and claudin-8: immunohistochemical markers for the differential diagnosis of chromophobe renal cell carcinoma and renal oncocytoma.
Oncocytic and clear cell variants of EAMLs can be easily misinterpreted as RCC, renal oncocytoma (RO), or adrenal cortical neoplasm in the renal and adrenal region.
Needle tract seeding following puncture of renal oncocytoma.