RESUMO
OBJECTIVE: To evaluate clinical-pathological aspects of uterine smooth-muscle tumors with a pathological diagnosis of uncertain malignant potential or leiomyomas with increased mitotic activity. METHODS: We reviewed the charts and pathological records of twenty seven patients with smooth muscle tumors of the uterus, with 5-9 mitotic figures per 10HPF (High power fields) and without cytological atypia or necrosis retrospectively. RESULTS: The patients were 29-60 (mean 41.8+/-6.8) years old and mean parity was 1.7+/-0.9. None of the patients had used any hormones preoperatively. The size of the myomatous tumors ranged from 2 to 23 cm (mean 7.1+/-4.6 cm). On gross examination all tumors appeared as typical leiomyomas. Twenty were intramural and 7 were submucous leiomyomas. The mitotic counts ranged 5-9/10 HPF (mean 6.0+/-1.2/10 HPF). Cytological atypia or necrosis were absent. The histological phase of the endometrium could be evaluated in 18 patients. Of these, ten had secretory-phase endometrium and proliferative endometrium was present in eight patients. Hysterectomy was performed in 20 patients with intramural leiomyoma, and myomectomy was in 7 patients under diagnosis of submucosal type. Postoperative follow-up periods ranged 5-94 months (mean 37.0+/-22.6 months). All patients were alive without evidence of recurrence or metastasis. CONCLUSION: Leiomyomas containing from five to nine mitotic figures per 10 HPF, without cellular atypia or necrosis, should be regarded as benign. Hysterectomy need not autonomically be done, as follow-up is a viable alternative. Myomectomy is an appropriate treatment, particularly in young patients interested in reproduction.