[Clinical consideration of percutaneous renal biopsy for renal tumor].

We performed ultrasound-guided biopsies on 14 patients having tumors that were difficult to distinguish as benign or malignant on computed tomography. The study took place from January 2004 to December 2011. Of the 14 tumors biopsied, 12 were malignant, 1 was benign, and 1 was a sampling error. Of the 12 malignant tumors, 7 were primary kidney carcinomas. Six patients received radical or partial nephrectomies, and all had a good prognosis. Three patients with metastatic kidney cancers died of the primary disease. Eleven patients (85.5%) were diagnosed pathologically by biopsies, allowing us to decide the course of treatment. However, because our tests also revealed one sampling error and one unspecified cancer, we determined that there are limitations to a renal biopsy.

Renal transcatheter arterial embolization for autosomal dominant polycystic kidney disease: report of two cases.

We report the results of renal transcatheter arterial embolization (renal-TAE) in two patients with autosomal dominant polycystic kidney disease (ADPKD) treated with hemodialysis (HD). A 73-year-old man and a 65-year-old woman on HD visited our department complaining of abdominal fullness, abdominal pain and appetite loss. Abdominal computerized tomography (CT) revealed polycystic kidneys. Both patients underwent renal-TAE. Approximately 1 month later, the symptoms had improved and CT showed decreased cyst volume. These results suggest that renal-TAE is a useful therapy for patients with ADPKD.