Hemangiopericitoma en la via urinaria tratados con cirugía radical y quimioterapia neoadyuvante. A propósito de dos casos / Urinary tract hemangiopericytoma treated with radical surgery and neoadjuvant chemotherapy. Report of two cases

RESUMEN

Objetivo: El hemangiopericitoma es un tumor de origen vascular muy infrecuente en la próstata. Son tumores de características agresivas y actualmente el tratamiento de elección es la cirugía radical. En la literatura existen descritos menos de 50 casos de hemangiopericitomas, y ninguno con tratamiento neoadyuvante. Dicho tratamiento neoadyuvante está descrito en otro tipo de sarcomas con buenas respuestas. Presentamos dos casos de un hemangiopericitoma maligno, uno tratado sólo con cirugía radical y otro con neoadyuvancia quimioterápica previa a la cirugía radical. Material y métodos: El primer caso es un varón de 40 años con síntomas urinarios obstructivos. Se diagnosticó de hemangiopericitoma tras realización de biopsia transrectal. Se decidió neoadyuvancia quimioterápica previa a la cirugía. El segundo paciente es un varón de 74 años con hallazgo accidental de masa renal. Tras nefrectomía radical se diagnosticó de hemangiopericitoma. Resultados: Tras la neoadyuvancia, en el primer paciente, se realizó una cistoprostatectomía radical y una resección de recto con derivación urinaria tipo Bricker y colostomía. El segundo paciente no precisó tratamiento adyuvante tras la cirugía radical. Conclusiones: El hemangiopericitoma es una entidad rara en los tumores urinarios. Actualmente la neoadyuvancia quimioterápica no está establecida como pilar del tratamiento de estos tumores, aunque en otros campos donde los sarcomas son más frecuentes, si que se objetiva mejor respuesta. En nuestro caso obtuvimos una buena respuesta con dicha neoadyuvancia previa a la cirugía, aunque es necesario un mayor seguimiento a una mayor cohorte de pacientes para establecer el uso de la quimioterapia neoadyuvante en los hemangiopericitomas urinarios

ABSTRACT

Objective: Hemangiopericytoma is a tumor of vascular origin. It is very rare in the prostate. They are generally aggressive tumors. Currently, the treatment ofchoice is radical surgery. In the literature, there are less than 50 cases described, and neoadjuvant treatment has not been reported in any article. This treatment presents positive responses in another type of sarcomas. Our goal is to report two cases of malignant hemangiopericytoma. The first case was treated with radical surgery and the second case was treated with neoadjuvant chemotherapy before surgery. Methods: The first case is a 40 year old male. Obstructive urinary symptoms were his first symptoms. A prostate mass with tumor characteristics was seen on ultrasound. After transrectal biopsy, he was diagnosed with hemangiopericitoma. Because the tumor size, neoadjuvant chemotherapeutic prior to radical surgery was decided. The second case is a 77 year old male with an incidental diagnosis of renal mass. After radical nephrectomy, he was diagnosed with hemangiopericitoma. He did not receive adjuvant chemotherapy. Results: In the first case, after neoadjuvant therapy, tumor size was reduced significantly. A pelvic exenteration with radical cystoprostatectomy and rectal resection and Bricker type urinary diversion and colostomy were carried out. In the second case controls after radical nephrectomy were correct and he did not need any treatment. Conclusions: In urinary tumors, the prostate hemangiopericytoma is a rare entity. Currently, neoadjuvant chemotherapy is not established as treatment for these tumors. For other sarcomas neoadyuvant treatment has good response. In our case, a good result was obtained with neoadjuvant chemotheraphy before surgery. However, a greater number of cases are necessary to establish the use of neoadjuvant chemotherapy in urinary hemangiopericytomas