Primary malignant lesions of the vagina are uncommon and represent approximately 1 -2% of all gynecologic malignancies. About 2% of all malignant vaginal lesions are primary sarcomas, the most common of these being leiomyosarcoma. We report the CT and MR imaging findings in a 41-year-old woman with vaginal leiomyosarcoma presenting as a bulky solid mass which caused expansion of the vaginal canal.