[Primitive neuroectodermal tumor. Ewing's sarcoma]. / Tumor neuroectodérmico primitivo renal/sarcoma de Ewing.

Primitive neuroectodermal tumor is an extraordinarily rare primary tumor in the kidney and can be mistaken for a variety of other round cell tumors. It is important to recognize each of these entities, because each carries unique therapeutic and prognostic implications. However, accurate diagnosis of these tumors is hindered by their significant morphologic overlap and complicated by their rarity. These neplasm are highly aggressive that tend to recurence and to metastatize. Standard therapy combining surgery, chemotherapy, radiation and genetic therapy. We report a case of primitive neuroectodermal tumor of the kidney in a 50 year old female patient.

[Pseudotumor renal after partial nephrectomy with the use of surgical gelatin sponge]. / Pseudotumor renal tras el uso de materiales hemostáticos en la nefrectomía parcial.

After renal parenchymal sparing surgery, with the use of surgical gelatin sponge, residual defects may persist on imaging studies at the sites of resection. These "pseudotumors" may lead to confusion as to whether a lesion was removed or has recurred. These lesions usually resolve within a year. We report a case of pseudotumor renal parenchymal sparing surgery in a 69 year old man, with resolution of the lesion 8 months after surgery.

[Foreign body simulating kidney tumour]. / Cuerpo extraño simulando tumor renal.

A six cm kidney tumour is found in a prostate control ultrasonography, in a 70 aged men. A chirurgical remove is indicated the tumour presented a very few separation of the kidney. The kidney was only compressed by the mass which contained a chirurgical gauze inside it from a previous surgery 35 years before.

[Priapism as an initial presentation of chronic myeloid leukaemia]. / Priapismo como presentación inicial de leucemia mieloide crónica.

We report the case of a 29 years old patient who presented, in the last three moths, four episodes of priapism without any other symptoms and any previous traumatism. An hemogram reveled that the repeted episodes of priapism were caused by a chronic myeloid leukaemia.

[Pure primary prostate transitional cell carcinoma. A review of our series]. / Carcinoma transicional primario puro de próstata. Revisión de nuestra serie.

Primary prostate transitional cell carcinoma is a very uncommon tumor, that represents about 1% of all prostate tumours. In our institution, only six patients have been diagnosed with pure transitional cell prostate carcinoma until 2002. Bladder origin of the neplasic was ruled out in all cases. We report a study about the progression and survival of prostate transitional cell carcinoma. These prostatic tumours carry a poor prognostic (median survival is 4.6 months) with a strong tendency to metastatic spread. Therefore, we suggest a radical prostatectomy (without cystectomy) when it rules out bladder origin tumour.

[Epidermoid carcinoma of the urethra and glans penis: two independent tumors?]. / Carcinoma epidermoide de uretra y glande: dos tumores independientes?

A 64 years-old man is treated in our hospital presenting a big tumor in glans penis. During the surgical act, another neoplasm is detected in the urethra. The microscopic study showed a concomintant epidermoid carcinoma of glans penis and urethra with non-affected tissue between both tumors.

[Intravesical foreign bodies. Review of the literature]. / Cuerpos extraños intravesicales. Revisión de la literatura.

We want to make a literature review about the bladder foreign bodies. This clinical situation is not an usual emergency, but there are a lot of references in urological articles about it. In this article review we want to make a compilation about the symtoms, the different origins of the foreign bodies, and ways of diagnosis and treatment of this pathology. We also want to add our personal experience in a recent case.

[Tumor recurrence in the resected area of the ureteral meatus after endoscopic disinsertion during radical nephroureterectomy]. / Recidiva tumoral en la zona de resección del meato ureteral tras desinserción endoscópica en la nefroureterectomía radical.

The endoscopical resection of the urether in the radical nephroureterectomy is an easy way to treat transitional cell carcinoma of the upper urinary tract. We want to present a complication derived from this surgical technique: the tumor implantation in the resected ureteral meatus zone.

[Skin metastasis of urothelial bladder tumor]. / Metástasis cutánea de tumor urotelial vesical.

We want to present a case of tranticional cell bladder carcinoma, where the first sign of disease progression was the appearance of a skin metastase. An unusual manifestation in a patient without another metastatic lesions.

[Post-traumatic hematoma in pathologic kidney]. / Hematoma postraumático en riñón patológico.

We want to present a case of postraumatic hematoma in a tumoral kidney. The diagnosis of the hematoma was made by abdominal scanner but not the tumor type. It was necessary the chirurgycal review and pathological study to demonstrate an angiomyolipoma as the cause of the kidney hematoma.

[Urinary diversions and bladder enlargements]. / Derivaciones urinarias y ampliaciones vesicales.

Overall review that offers an integrated insight of the importance and repercussions of urinary by-pass and bladder replacement. Over the last decades there has been a growing interest in the possibility of reconstructing the urinary system and there are now an almost infinite number of surgical solutions. The history of the development of using the intestine for by-passes and the reconstruction of the urinary system is described. The secondary metabolic alterations, the possibility of secondary intestinal tumours and the rudiments of ureterointestinal anastomosis are dealt with. Bladder substitution techniques are highlighted, and the vast experience of the Urology Department of Hospital Miguel Servet explained, including criteria and conclusions that help to choose from the many urological surgery alternatives headed by urinary by-pass and bladder complications.

[Appendix mucinous cystadenoma]. / Cistoadenoma mucinoso apendicular.

Mucous cystadenomas are benign epithelial tumours with great mucous content inside. Despite being non-malignant, they acquired great size, compressing and displacing important structures and organs of the zone, with theirs unlucky outcomes. Surgical exeresis is very difficult, being almost impossible its total exeresis, showing great frequency of relapse. We present an appendix mucous cystadenoma case in a 54 years old patient.

[Endoscopic ureteral resection in radical nephroureterectomy: report of our experience]. / Desinserción ureteral endoscópica en la nefroureterectomía radical: presentación de nuestra experiencia.

We want to present our clinic and chirurgical experience in eight patients, using the radical nephroureterectomy with endoscopical resection of the ureter, as a safe and valid technique, in urothelial tumours localized in the upper urinary tract.

[Urethral amyloidosis]. / Amiloidosis localizada de la uretra.

Localized amyloidosis of the urethra is a rare pathological entity. Biopsy is required to make the appropriate diagnosis. Although localized therapy is available for obstructing, symptomatic lesions, asymptomatic lesions may be followed with conservative management and spontaneous regression has been reported. An appropriate medical evaluation should be performed to determine the presence of systemic amyloidosis.