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Juxtaglomerular Cell Tumor

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Juxtaglomerular cell tumor is highly vascular and consists of small venules, muscular arterioles, and capillaries interposed between monomorphic tumor cells. Branching vessels with "stag-horn" configuration resembling those seen in hemangiopericytoma may also be present. This image shows large sinusoidal vascular spaces separating cords of tumor cells. The tumor arises from juxtaglomerular cells - a component of the juxtaglomerular apparatus which plays a role in regulating blood pressure via renin release.

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