Seminal vesicle leiomyosarcoma: Case report and literature review.

INTRODUCTION AND BACKGROUND Primary leiomyosarcoma of the seminal vesicle is an extremely rare and highly malignant disease with less than 15 cases reported. CASE DESCRIPTION A 34-year-old man presented with acute urinary symptoms. Imagen studies showed an abdominal mass (80 mm × 65 mm × 50 mm) with contrast enhancement, compressing the right side of the bladder but with a clear cleavage level between surrounding organs. The patient underwent a transrectal US-guided biopsy which was informed as compatible with leiomyosarcoma by immunohistochemical characterization. We performed a cystoprostatectomy and pelvic lymphadenectomy plus radiotherapy. Pathology showed a 7.5 cm × 6 cm nodular para-vesical Leiomyosarcoma histological grade 2 with 0/22 lymph nodes involved. Twelve months after the surgery no recurrences have presented. CONCLUSION A multi-disciplinary therapeutic approach, combined with close follow-up, is mandatory to obtain good outcomes in such rare and challenging cases.