Treatment for rectourethral fistulas after radical prostatectomy with biological material interposition through a perineal access

INTRODUCTION

Rectal injury is a rare complication after extraperitoneal laparoscopic radical prostatectomy. The development of rectourethral fistulas (URF) from rectal injuries is one of the most feared and of more complex resolution in urology.

MATERIAL AND METHODS

Between 2013 and 2020 we have operated on a total of 5 patients with URF after extraperitoneal endoscopic radical prostatectomy through a perineal access using the interposition of biological material. All fistulas had a diameter of less than 6 mm at endoscopy and were less than 6 cm apart from the anal margin.

RESULTS

The mean age of the patients was 64 years old. All patients had a previous bowel and urinary diversion for at least 3 months. Under general anesthesia and with the patient in a forced lithotomy position, fistulorraphy and interposition of biological material of porcine origin (lyophilized porcine dermis [Permacol®]) were performed through a perineal access. Mean operative time was 174 min (140-210). Most patients were discharged on the third postoperative day. The bladder catheter was left in place for a mean of 40 days (30-60). Prior to its removal, cystography and a Gastrografin® barium enema were performed, showing resolution of the fistula in all cases.

CONCLUSIONS

The interposition of biological material from porcine dermis through perineal approach is a safe alternative with good results in patients submitted to urethrorectal fistulorraphy after radical prostatectomy.

[Nephroblastoma. Long-term experience in the multidisciplinary approach]

OBJECTIVES

Main objective: to perform a descriptive study of patients with nephroblastoma, diagnostic tests, medical and surgical treatment. Secondary objective: to evaluate the rate of relapse and 5-year survival and risk factors for relapse and death.

MATERIALS AND METHODS

Retrospective study of patients with nephroblastoma treated according to the protocol of the SIOP-2001. Demographic variables, comorbidities and associated syndromes were collected. Other data were tumor location, size, extent and stage. The relapse rate and the development of other secondary tumors as well as the long-term survival were also studied.

RESULTS

We collected 33 patients with nephroblastoma. A biopsy was performed in 7 patients (21.2%). The Kaplan-Meir curve for event-free survival (tumor recurrence) was 84% with a 95% CI = [0.73-0.98] and the Kaplan-Meier overall survival curve was 0.93 95% CI [0.85-1]. Recurrence occurred in all patients before the first year.

CONCLUSIONS

Nephroblastoma is a tumor with a favorable prognosis. The unfavorable histology as well as advanced stages are factors of a poor prognosis. The follow-up must be exhaustive during the first year after the diagnosis.