Leiomyosarcoma after hysteroscopic myomectomy: a case report

Objectives: The aim of this study was to illustrate the importance of hysteroscopy in the evolution of mitotically active leiomyoma to leiomyosarcoma (LMS). Uterine sarcomas are rare tumors. The three microscopic criteria are: 1) the presence of coagulative tumor necrosis, 2) high mitotic index (exceeding 15 x 10 catabolite gene activator (CGA) and 3) occurrence of moderate to severe cytologic atypia. The authors report a case of a 52-year-old nulliparous woman with a LMS detected two months after a hysteroscopic resection of a mitotically active leiomyoma. After the first hysteroscopic resection the diagnosis was atypical leiomyoma with a mitotic index of two per ten high-power field (hpf) in the absence of coagulation necrosis. After two months, a new myoma was detected and another hysteroscopic resection was performed: the microscopic diagnosis was LMS and a total abdominal hysterectomy with bilateral salpingo-oophorectomy (BSO) was performed. Conclusion: The patient must undergo close clinical and instrumental follow-up procedures. Hysteroscopy plays an important role in the evaluation and evolution of both recurrent and de novo disease.