Raro Caso de Leiomioma Paratesticular

Introduction: Paratesticular tumors account for 2% of genitourinary neoplasms. They are benign neoplasms originating from the mesenchymal tissue, of slow and indolent growth, with no definite etiology, and can appear in any tissue composed of smooth muscle. Note the leiomyomas, which are considered a rare neoplasia in this location, so that their diagnosis is often confused with testicular tumors. Clinical Case: The authors present a case of a 56-year-old male patient admitted to the urology outpatient clinic with a large painless mass in the right testis of slow growth and a 3-year evolution. After further examination, he underwent right inguinal orchiectomy. The histopathological analysis and immunohistochemical profile of the surgical specimen showed a mesenchymal neoplasia compatible with atypical Paratesticular Leiomyoma, with borderline behavior and indolent growth. Discussion: This is a rare benign pathology whose etiology is frankly unknown and easily diagnosed as testicular origin. Therefore, this report sets out the objective of introducing this entity into medical knowledge in order to collaborate on future approaches.