Solitary perirenal metastasis from a malignant peripheral nerve sheath tumour mimicking a primary renal tumour.

We present an uncommon case of a large solitary perirenal metastasis from a malignant peripheral nerve sheath tumour (MPNST) mimicking a primary renal tumour. A metastatic MPNST to the perirenal space is unusual and, in this rare location, is difficult to differentially diagnose from a primary renal tumour.

[Unilateral renal agenesia and transitional cell carcinoma: report of 2 cases]. / Agenesia renal unilateral y carcinoma de células transicionales: a propósito de dos casos.

OBJECTIVE: To describe two cases of unilateral renal agenesis complicated by the association of a urothelial carcinoma and review the literature. METHODS: After reviewing our series of transitional cell carcinoma, we found two cases with associated unilateral renal agenesis. Case 1: A 46-year-old male with grade III stage C transitional cell carcinoma of the urinary bladder that was treated sequentially by transurethral resection of the bladder, systemic neoadjuvant polychemotherapy (gemcitabin, taxol and cisplatin) before radical cystectomy and Bricker urinary diversion were performed. Due to the extent of the tumor, complementary adjuvant therapy was administered, but the patient died 10 months after cystectomy due to disease progression. Case 2: An asymptomatic 71-year-old male in whom renal agenesis and ureteral pelvic filling defect, which was treated by ureterectomy, were incidentally discovered during a routine abdominal study. At one year follow-up, no evidence of tumor recurrence has been observed. RESULTS: 23 patients with unilateral renal agenesis in association with different endocrine or genitourinary cancers have been reported in the literature. In unilateral renal agenesis anomalies of some of the genes involved in renal development occur and may lead to dysplastic growth of the embryologically related organs and an increased risk of developing tumors. CONCLUSIONS: 93% of the tumors reported in patients with unilateral renal agenesis were found to arise from the genitourinary organs.

[Tuberculous epididymitis caused by Mycobacterium bovis]. / Epididimitis tuberculosa por Micobacterium bovis.

OBJECTIVES: To focus on the need of including tuberculosis among differential diagnoses of any epidymo-testicular mass, especially if its evolution is torpid. METHODS/RESULTS: A 73-year-old man who presented with scrotum abscess underwent surgical drainage and antibiotic treatment, but suppuration relapsed through cutaneous fistulae. A epipidymectomy was then performed, which demonstrated tuberculous granulomas. Torax Rx showed a cystic apical pulmonary wound which was treated with 3 antituberculostatics for 12 months. Sputum culture was positive for Micobacterium Bovis. CONCLUSIONS: Aspirative punction under sonographic control is a valuable technique to avoid mutilating surgeries and to permit an almost always effective treatment, before the appearance of permanent lesions which lead to sterility.