Leiomyosarcoma with rhabdoid differentiation arising from leiomyoma: A rare entity

Abstract

Leiomyosarcoma (LMS) arising in a leiomyoma (LM) is a rare event. Still rare is rhabdomyoblastic differentiation in leiomyosacoma. We present such a case of LMS uterus with rhabdomyoblastic differentiation arising in an LM in a 60-year-old menopausal woman who presented with lower abdominal pain. An ultrasound scan was suggestive of uterine fibroid. Total abdominal hysterectomy was performed for presumed LM. Grossly, fibroid had variegated appearance along with focal areas having whorling pattern and histopathology showed leiomyosarcomatous change in a benign LM with rhabdomyoblastic differentiation. This is a rare complication of LM and precise diagnosis of LMS is essential since it has an aggressive behavior.

Keywords

• Leiomyoma
• leiomyosarcoma
• rhabdomyoblastic differentiation
• uterus