Primary collision tumors of the kidney composed of oncocytoma and papillary renal cell carcinoma: A review.

Background: There are well known cases of hybrid tumors of chromophobe renal cell carcinoma (RCC) and oncocytoma in kidney, where both tumors have the same cell of origin - intercalated cell of the collecting duct. However, collision tumors composed of neoplasms originating from different cell lineages such as oncocytoma and papillary RCC are extremely rare. Herein, we made a collective literature review of reported cases of collision tumors composed of oncocytoma and papillary RCC, adding a case that we recently experienced.

Use of ureteral stents in the management of major renal trauma with urinary extravasation: is there a role?

Five patients with major (Grade IV) renal trauma required ureteral stent placement to facilitate urinary drainage. Three of these patients had stents placed for recurrent gross hematuria with flank pain. All three had obstructing blood clots present at the time of stent placement.

Iatrogenic ureteral injuries: a 20-year experience in treating 165 injuries.

Purpose: We reviewed the causes, treatment and morbidity associated with iatrogenic ureteral injuries.

Materials And Methods: From 1972 to 1992 the charts of all patients with the diagnosis of iatrogenic ureteral injury were reviewed and 156 injuries were identified.

Results: Urological, gynecological and general surgical procedures accounted for 70 (42%), 56 (34%) and 39 (24%) injuries, respectively.

Renal histological changes secondary to ureteropelvic junction obstruction.

The treatment of children with apparent ureteropelvic junction obstruction is controversial. In an asymptomatic infant or child the decision to recommend pyeloplasty usually is based on interpretation of the renal scan. We retrospectively analyzed the renal biopsy obtained during pyeloplasty in 55 children.

Outpatient nephrectomy for nonfunctioning kidneys.

We describe a surgical approach that allows multicystic dysplastic and nonfunctioning hydronephrotic kidneys to be removed on an outpatient basis through a 2.5 to 3 cm. subcostal incision.