The renal capsule is the most common site of genitourinary tract involvement, but testis-associated leiomyomas are extremely rare with only 16 cases reported in the literature.

• 在泌尿生殖系统中以于肾被膜最为常见，但于?丸长出之平滑肌肉瘤则极为少见，目前由文献整理出仅有十六位病例。