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Newly developed hypertension due to juxtaglomerular cell tumor in pregnancy.

An unusual case of juxtaglomerular cell tumor (JCT) is presented. A 29-year-old woman visited our hospital for the management of incidentally detected renal mass due to newly developed hypertension in the 20th week of pregnancy. Laboratory studies showed increased basal plasma renin activity and hypokalemia but serum aldosterone level was normal. Abdominal computed tomography scan showed about 2.4 cm sized multicystic mass in the right kidney. Nephron-sparing surgery was performed with excellent results. On histological examination, the tumor exhibited a structure typical feature of JCT. A few days later the patient's blood pressure had been normalized.