Haematopoiesis in a degenerating uterine leiomyoma.

We report the case of a 66-year-old woman who had a hysterectomy because of uterine tumour. Histological examination showed a leiomyoma with degenerative changes and extensive extramedullary haematopoiesis. There was no evidence of any haematological or systemic disease. Extramedullary haematopoiesis in patients without haematological disorders is very rare and has apparently never been described previously in association with a leiomyoma of the uterus.