title: Renal capsular leiomyoma: Report of a case with unusual CT appearance.
abstract: Clinically symptomatic renal capsular leiomyomas are rare. Previous research has shown that these tumors are usually well-defined cystic lesions, solid lesions, or a mixture of the two. We report an unusual case of renal capsular leiomyoma which was well defined by ultrasonography, but lacked a well-defined edge in CT. The reason for the absence of a well-defined tumor edge is probably due to degeneration in certain parts of the tumor resulting in a different degree of enhancement. Thus, the possibility of renal capsular leiomyoma should be included in the differential diagnosis whenever a renal mass is found, especially when either CT or ultrasonography shows that the tumor has a smooth, well-defined contour.
authors.affiliation: Department of Radiology, Chi-Mei Medical Center (Yung-Kang Campus), Tainan, Taiwan, Republic of China. drcwmak@so-net.net.tw
authors.forename: C-W
authors.initials: CW
authors.lastname: Mak
authors.forename: C-K
authors.initials: CK
authors.lastname: Chou
authors.forename: W-S
authors.initials: WS
authors.lastname: Tzeng
mesh_terms: D000328:Adult; D003287:Contrast Media; D003937:Diagnosis, Differential; D005260:Female; D006801:Humans; D007680:Kidney Neoplasms / Q000000981:diagnostic imaging* / Q000601:surgery; D007889:Leiomyoma / Q000000981:diagnostic imaging* / Q000601:surgery; D009392:Nephrectomy; D014057:Tomography, X-Ray Computed; D014463:Ultrasonography
chemical_list: D003287:Contrast Media