Uterine leiomyoma with skeletal muscle differentiation. Report of a case

Skeletal muscle differentiation is reported in a uterine leiomyoma from a 54-year-old woman. Evidence of rhabdomyoblastic features included a typical light microscopic appearance, immunoreactivity with antimyoglobin antibodies by immunoperoxidase studies, and the presence of myofibrils by electron microscopic examination. The patient is well more than two years after surgery.