[Urologic complications in renal transplantation: our experience with 200 cases]. / Complicaciones urológicas en el trasplante renal: nuestra experiencia en 200 casos.

Urinary tract complications continue to be a major cause of morbidity in renal transplant patients. This paper is a review of the urological complications developed in in 200 renal transplants performed in our service over a 10-year period, from January 1980 to December 1989, with a follow-up of at least 1 year. We include a total of 29.5% urological complications, subdivided in two sections each corresponding to a distinct period during which different procedures were used in the renal transplantation unit. The report includes an analysis of the complications' etiopathogenic, diagnostic and therapeutic factors.

[Renal hemangiomas: a clinical case and review of the literature]. / Hemangiomas renales: caso clínico y revisión biliográfica.

Renal haemangiomas, an unusual cause of renal haematuria, are benign vascular dysplasias of uncertain etiology. Usually asymptomatic, their clinical manifestation is a unilateral renal haematuria associated or not to obstructive urological disease through accumulation of clots in the urinary tract and arterial hypertension when associated to a major arteriovenous shunt. Arteriographic diagnosis is based on the size of the vascular malformation but the absence of findings in the arteriography does not eliminate the presence of small-sized haemangiomas or microhaemangiomas responsible for the renal chronic haematuria, also labelled as "essential haematuria", which sometimes can be diagnosed through endoscopic examination of the renal cavities. This report presents one case of renal haemangioma which appeared as a massive, sudden haematuria and prompted haemodynamic instability requiring haemotherapy. Following arteriographic diagnosis, selective transarterial embolization was undertaken with three modified Gianturco's metal helicoids, to which the patient responded favourably. The report includes a review of the clinical, pathological, diagnostic and therapeutical features of renal haemangiomas.

[Filling defects in the upper urinary tract: update on the etiologic diagnosis and review of the specific value of urinary cytology]. / Defectos de repleción en vía urinaria alta: actualización del diagnóstico etiológico y revisión del valor específico de la citología urinaria.

We present 3 cases with upper tract filling defect and exfoliative cytology positive for malignant cells in 2 of these cases (micturition and via ureteral catheter, respectively). The initial suspicion of urinary tract tumor was discarded by subsequent work up in 2 patients who were managed conservatively and followed closely. The third patient was submitted to nephroureterectomy. The histopathological examination disclosed chronic pyelonephritis and a deposit of amorphous mucoid material but no evidence of tumor. We review the etiologies of upper tract filling defects and present a useful diagnostic algorithm for the study of these conditions and the etiopathogenic and physiopathologic evaluation of the false positives in urinary cytology.