[Leiomyosarcoma of the urinary bladder. A little frequent neoformation]

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.