Uterine bizarre lipoleiomyoma.

A case of uterine bizarre lipoleiomyoma occurring in a 58-year-old woman is described. A subserosal 8.5 cm mass in the posterior wall of the body had a lipoma-like appearance with strands of fibrous tissue. Histologically, the tumor predominantly consisted of adipocytes which varied in size and shape. Some cells had the appearance of signet ring cells, some had hyperchromatic nuclei, and multivacuolated lipoblasts with hyperchromatic nuclei were observed throughout the lesion. The fibrous areas showed a proliferation of smooth muscle cells with and without atypical nuclei. There was no mitotic figure. Flow cytometric analysis indicated aneuploidy. The patient was well without disease 10 months after hysterectomy. Patients with this type of tumor need a close and long-term follow-up because of the paucity of clinical information.