DOI: 10.36347/sjmcr.2014.v02i03.003

Pages: 128-130

Cotyledonoid dissecting leiomyoma known as “Sternberg tumor of the uterus” is rare variant of benign uterine leiomyoma. We report a case of cotyledonoid dissecting leiomyoma in a 46-year-old woman who presented with menorrhagia and abdominal pain. A transvaginal ultrasound scan showed a 12cm sized, irregular contoured mass in the left lateral aspect of the uterus. A total abdominal hysterectomy with bilateral salpingooophorectomy was performed with complete lateral mass in the subserosal region. Microscopic examination showed variable sized micronodules of benign smooth muscle fascicles, which were separated by fibrous connective tissue with a marked hydropic change. Immunohistochemically, the tumor showed a strong staining for both desmin and muscle-specific actin. Final diagnosis reported as cotyledonoid dissecting leiomyoma. Cotyledonoid dissecting leiomyoma may be gross appearance lead to a mistaken diagnosis of a malignant tumors. Therefore, both clinicians and pathologists should be well aware of these leiomyoma variants. This type of leiomyomas should be subjected to frozen section in order to avoid over treatment for especially preserve the fertility in young women.