BENIGN TUMOR OF KIDNEY WITH RENIN SECRETION, SO-CALLED OF JUXTA-GLOMERULAR APPARATUS - OPTIC AND ULTRASTRUCTURAL-STUDY

Abstract

Benign renin secreting tumors of the human kidney, of which a new case is reported, are an uncommon cause of arterial hypertension. The lesion is unique, benign, richly vascularized and constituted by epithelioid cells similar to those seen in the normal juxtaglomerular apparatus. Noteworthy and of great diagnostic value is the massive infiltration of the tumor tissue by mastocytes. The ultrastructural examination shows the differentiation of secretory cells from smooth muscle fibers of the vessel walls. The other types of renin secreting tumors are briefly considered.