[Angiomiofibroblastoma of the vulva. Report of case]. / Angiomiofibroblastoma de la vulva. Reporte de caso.

Angiomyofibroblastoma is a benign mesenchymal tumor of the lower genital tract described in 1992 by Fletcher and his group. Must be differentiated mainly from aggressive angiomyxoma, which has a high local recurrence rate. We report the case of a 21 year old patient who attended the General Hospital Dr. Miguel Silva, in Morelia, Michoacan, because post-term pregnancy of 41.1 weeks gestation, with a bulky vulvar tumor, asymptomatic with four years of evolution. Cesarean section and vulvar tumor resection were performed. The surgical specimen measured 14 x 10 x 5 cm, had a polypoid aspect, multilobulated, with nodules of varying size. From a microscopic point of view the tumor was well defined, formed by loose connective tissue septa, with stromal fusiform cells and benign characteristics, between collagen fibers, with abundant vessels. The histochemical studies were positive for desmin and vimentin. These anatomopathological findings are diagnostic of vulvar angiomyofibroblastoma, benign course tumor, does not resort nor does it generate metastases after simple surgical resection; however, recurrence in the vagina is reported. Must be differentiated from other mesenchymal neoplasms of the genital tract.

[Cotyledonoid dissecting leiomyoma of the uterus. A malignant-looking benign tumor]. / Leiomioma cotiledonoide disecante del útero. Un tumor benigno de apariencia maligna.

The cotyledonoid dissecting leiomyoma of the uterus, or Stenberg tumor, is a rare variant of a smooth muscle benign tumor, classified in the group presenting an unusual growth pattern; clinically, it affects women in reproductive age. We report the case of a 43 year-old woman, who turned up at the Centro Estatal de Atencion Oncologica (State Cancer Care Center) in Morelia, Michoacan, presenting abnormal uterine bleeding and uterine fibroid of major elements. When performing a palpatory bimanual exam, a loose uterus of approximately 7 by 6 inches was identified; it ached when moving. The laboratory tests reported normal parametriums; the ultrasound showed, however, uterine fibroids of major elements. The uterus was enlarged due to a tumor of exophytic growth, which resembles placental cotyledons extended over the uterine surface, composed by smooth muscle nodules that dissected the uterine wall, and with infiltrative appearance in parametriums and the myometrial wall. Despite this microscopic aggressive appearance, a number of ultrastructuctural studies and immunohistochemical techniques proved its benign nature. This can help patients who want to preserve fertility avoid radical surgery.