左腎下極に見られた石灰化組織塊の1例

Abstract

This report deals with a case of calcified tissue mass found in the lower pole of the left kidney in a 29-year-old Japanese female who was refered to us by a local physician under a diagnosis of left nephrolithiasis. Urological exam i n ation revealed an irregular shaped calcified mass projecting downward from the lower pole of the left kidney. The rest of the urinary tract appeared normal. Urinalysis and urine culture examinations including for tuberculous bacilli were all negative. Partial nephrectomy was performed on April 7, 1965, and the mass was remov e d with the surrounding kidney tissue of the left lower pole. The mass was irregular nodular shaped but well-encapsulated, measured as much as 2.0 x 2.2 x1.3 cm. It was moderately firm and, on section, disclosed greyish-white solid material, which was sharply circumscribed from the remaining portions of the kidney. It involved both the cortex and the medulla and encroached upon, but did not open into the renal pelvis. The histological findings consisted of extensive f i bruos tissue with marked calcium deposition and some epithelial cells forming tubular appearance. However, there were no evidence of definite tuberculous pathology, though it was deeply suspected. The postoperative course was uneventful and the pa t i ent has been in good health up to present and enjoying normal life.