[Multilocular cystic nephroma. A diagnostic and therapeutic challenge. Report of two cases].

Objectives: Multilocular cystic nephroma is a rare benign entity grouped among the cystic non genetic diseases, which usually presents with a clinical picture and radiological features indistinguishable from malignant neoplasias, making impossible to rule out malignancy preoperatively.

Methods: We report two cases of multilocular cystic nephroma which were treated with different surgical attitudes despite their clinical and radiological similarities, because on the second case intraoperative pathologic study of the specimen was performed.

Results: The diagnosis of multilocular cystic nephroma was confirmed in both cases, with the difference that radical nephrectomy was performed in the first case whereas the intraoperative study of the tumor in the second allowed to perform tumorectomy with renal parenchyma preservation.

[The expression of p53 and c-erb-2 in transitional cell carcinoma of the kidney pelvis and ureter and its relation to tumor progression and survival].

Objective: To evaluate P 53 and c-erb-2 overexpression as a prognostic factor for progression and survival in patients with renal pelvis and ureter tumors.

Methods: Retrospective review of the medical records and pathology/immunohistochemical reports of 61 patients who underwent surgery for upper urinary tract urothelial tumors. Immunohistochemical studies were performed using the STREPTAVIDIN-BIOTIN-PEROXIDASE techniques with a LASAB kit (DAKO).

[Personal and histopathological factors as prognostic variables in upper urothelial tumors undergoing surgery].

Objective: To analyze the influence of personal and histopathological factors as prognostic variables in the evolution of upper urothelial tumors submitted to radical surgery.

Methods: Multifactorial retrospective study of a series of 61 patients submitted to radical surgery for upper urinary tract transitional cell tumors. Patient habits and histopathological factors are analyzed.

[Intraureterocele transitional tumor synchronous with contralateral ureteral tumor: obstructive uropathy in panurothelial disease].

Objective: To present a case of urothelial tumor inside a simple ureterocele with a coexisting contralateral tumor that caused bilateral obstructive uropathy.

Methods: Follow-up evaluation of a 74-year-old male patient with superficial tumor of the urinary bladder diagnosed 4 years earlier, revealed renal failure and bilateral obstructive uropathy. The complementary tests showed a simple left ureterocele containing a lesion suggestive of a tumor and a right ureteral tumor.

[Syringocele of the Cowper's gland. Report of 2 cases diagnosed in adulthood].

Objective: To describe two cases of symptomatic syringocele diagnosed in adult patients.

Methods/results: Two cases of symptomatic syringocele diagnosed in adult patients that both consulted for obstructive voiding syndrome, are described. Diagnosis was made by retrograde urethrography.

[Acute hematuria as first manifestation of bladder urothelioma in a 17-year-old adolescent].

Objective: To report a case of urothelial tumor of the bladder in a 17-year-old patient that required emergency surgical treatment due to acute hematuria.

Methods: The clinical history, anatomopathological and immunohistochemical findings are described.

Results: A 17-year-old patient with no remarkable clinical history, consulted at the emergency services for gross hematuria of sudden onset that caused anemia and was refractory to conservative management.