This report presents a case of a 16-year-old hypertensive boy who presented to our clinic. Laboratory findings showed severe hypokalemia and markedly increased plasma renin activity. Abdominal ultrasonography and contrast-enhanced computed tomography of the abdomen revealed a well-circumscribed, solid, hypoenhancing cortical lesion (2 cm) in the lower pole of the left kidney. The patient under- went nephron-sparing surgery. Histopathologic examination gave a diagnosis of juxtaglomerular cell tumor. Reninoma is an uncommon cause of hypertension in a young adult and should be included in the differential diagnosis as a potential life-threatening and curable condition. The conservative surgical management is the gold standard for small, circumscribed lesions.

Keywords:
Hypertension, Young adult, Juxtaglomerular, Kidney tumor, Hypokalemia
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© 2010 S. Karger AG, Basel
2010
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