[Bladder leiomyoma. Report of a new case].

Benign mesenchymal tumors arising from muscle fiber are rarely encountered in the urogenital tract and account for 1-5% of all bladder tumors. This tumor type can present as multiple lesions and at different sites. Intramural, extramural and endovesical lesions, which are the most frequent, can be found in the bladder. An intramural tumor that had been incidentally detected is described and the literature reviewed, highlighting the benign nature of this tumor type, which does not recur if resection is complete.