[Malignant fibrohistiocytoma of the renal capsule. Report of a case and review of the literature]. / Fibrohistiocitoma maligno de cápsula renal. Aportación de un caso y revisión de la literatura.

Presentation of one case of malignant fibrohistiocytoma derived from the renal capsule. While conducting a bibliographic review the low incidence of this tumoration of renal origin was noted. The difficulties in differentiating this entity from a secondary renal invasion by a malignant fibrohistiocytoma derived from other retroperitoneal structures is commented. Brief review of current diagnosis and therapeutical management for this tumoral entity.

[Leiomyosarcoma of the urinary bladder. A little frequent neoformation]. / Leiomiosarcoma de vejiga urinaria. Una neoformación muy poco frecuente.

Presentation of one case of vesical wall leiomyosarcoma found during exploratory laparotomy due to abdominal pain, where partial cystectomy and lymphadenectomy were performed. Due to the singularity of this tumour, drafting of this clinical communication was undertaken including a brief review of the existing literature relative to the diagnosis and treatment of this neoformation.

[Verrucous carcinoma of the penis or Buschke-Löwenstein tumor. A rare tumor. Apropos of a case]. / "Carcinoma verrucoso de pene o tumor de Buschke-Löwenstein". Una tumoración poco frecuente. A propósito de un caso.

An additional case of verrucous carcinoma of the penis is described. This tumor type accounts for approximately 5% of squamous carcinomas of the penis. Today penile verrucous carcinoma is widely considered to be the same tumor as that described by Buschke and Löwenstein in 1925. The histological and clinical features as well as the therapeutical aspects of this tumor type are briefly reviewed herein.

[Fibroepithelial polyp with atypical stromal cells in the trigone of the bladder as a cause of lower obstructive uropathy]. / Pólipo fibroepitelial con células estromales atípicas en el trígono vesical como causa de uropatía obstructiva baja.

Fibroepithelial polyp of the trigone of bladder conditioning an occlusive syndrome at the bladder cervix level causing secondary multidiverticular bladder with ureterohydro-nephrosis and chronic bilateral pyelonephritis. Besides the rare vesical location for the fibroepithelial polyps, the case also presents some atypical stromal cells.

[Papillary necrosis and formation of fungal balls in a patient with AIDS: a clinical case and brief review]. / Necrosis papilar y formación de pelotones de hongos en paciente afecto de SIDA: caso clínico y breve revisión.

An AIDS case, with a Candida urinary infection causing papillary necrosis and accompanied by occurrence of fungal lumps is reported. The paper remarks on the incidence and peculiarities of urinary affectation in these patients, emphasizing the usefulness of percutaneous nephrostomy as a diagnostic, and above all as a therapeutic procedure, in cases of expanded urinary tract.

[Inverted papilloma or inverted urothelial carcinoma. A problem not yet resolved in its totality. Contribution of two new cases to the literature]. / Papillome inversé ou carcinome urothélial inversé. Un problème qui encore aujourd'hui n'a pas été résolu dans sa totalité. Apport de deux nouveaux cas à la littérature.

We present two case of inverted vesical papillomas, one of a trabecular histology and the other glandular, which--in view of the appearance in the last few years of inverted papillomas coexisting alongside other urothelium tumorous states, recurring and even malignant inverted papillomas--raise the possibility of them being considered as superficial urothelium carcinomas. We propose the use of post-surgical endo-vesical chemotherapy, above all in the patients affected by the trabecular variety of inverted papillomas, due to their high indices of recurrence and high possibilities of malignancy.

[A new case of multilocular cyst]. / Un nuevo caso de quiste multilocular.

We report another case of multilocular cyst of the kidney. We underscore the current theory on the neoplastic and not cystic origin of this disease entity. Attention is drawn to the confusion arising from a wide variety of terms (17) used to refer to this disease entity. Its clinical features, diagnosis, and treatment are briefly discussed. We highlight the need to follow currently available diagnostic criteria in diagnosing multilocular cyst of the kidney.