Alberto Pizarro Gallardo^(1)
(1)Facultad de Medicina U.A.N. - Tepic. Mexico

		[Urology]
	[Pathology]

INTRODUCTION

The term "oncocyte" was introduced by Hamperl⁽¹⁾. He identified the oncocytes by their abundant, finaly granular acidophilic cytoplasm found most often in salivary glands, lacrimal glands, and various endocrine organs.

Oncocytomas are a rare variant of renal adenoma with abundant eosinophilic cytoplasm and a central fibrous scar. They account for less than 7 % of renal neoplasm.^(2-3) Most affected patients are asymptomatic and the lesion is usually incidentally detected.^(3-4)

Paraganglioma Cchemodectoma) are tumors arising in or around the sympathetic ganglia, outside the adrenal medulla. It is an extramedullary pheochromocytoma. The tumor have similar histological features and prognosis to pheochromocytomas.^(5-7)Paraganglioma have essential or paroxysmal hypertension, sometimes sweating and palpitations.

Histological features: Oncocytomas are cytoplasmic granularity by large numbers of mitochondria. there is not glycogen and are PAS- negative. Ultrastructurally, oncocytoma cells contain large number of mitochondria.^(2-4,7-8)

Paraganglioma have haemorrhagic foci and cyst. The tumor have catecholamines; they can be demostrated with dichromate fixatives. its cells have basophilic and granular cytoplasm. its pathological diagnosis was by immunohistochemestry.^(5-7)

In the present report, we described two neoplasm resected: kidney oncocytoma and abdominal paraganglioma.

Discussion Board

Any Comment to this presentation?

[ABSTRACT] [INTRODUCTION] [MATERIAL & METHODS] [RESULTS] [IMAGES] [DISCUSSION] [CONCLUSIONS] [BIBLIOGRAPHY] [Discussion Board]

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		[Urology]
	[Pathology]

Alberto Pizarro Gallardo
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Last update: 13/01/00