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Angiomyolipoma of the kidney is a neoplasm composed of variable amounts of mature adipose tissue, smooth muscle, and thick-walled blood vessels derived from perivascular epithelioid cells (1â3). Its prevalence in the general hospital population has been reported to be 0.13% in Japan (4).
Angiotensin II also stimulates the secretion of the hormone aldosterone from the adrenal cortex. Aldosterone causes the tubules of the kidneys to increase the reabsorption of sodium and water into the blood, while at the same time causing the excretion of potassium (to maintain electrochemical balance).hen renal blood flow is reduced, juxtaglomerular cells in the kidneys convert the prorenin already present in the blood into renin and secrete it directly into the circulation. Plasma renin then carries out the conversion of angiotensinogen released by the liver to angiotensin I.