Objectives: To conduct a pathological characterization of rare uterine myxoid leiomyosarcoma (MLS) and establish an effective chemotherapy for metastasis after hysterectomy.
Methods: Histological and immunohistochemical methods were used to characterize the type of uterine MLS in a 39-year-old female. For multiple lung metastases found 3 months after operation, CYVADIC (400 mg cyclophosphamide, 1 mg vincristine, 50 mg epirubicin and 400 mg dacarbazine per body for one course) and oral etoposide (50 mg/body per day for 2 weeks) were applied.
Results: The rapidly enlarging uterine tumors exhibited gelatinous cut surfaces, a high count of 30 mitotic cells per 10 hpf and mucinous stroma, indicating a rare high-mitotic type of uterine MLS. The two-course CYVADIC-etoposide therapy was effective for disseminated pulmonary metastases.
Conclusion: The present MLS was a rare high-mitotic type. CYVADIC-etoposide was an optional effective chemotherapy for lung metastasis in this case.