Malignant transformation of pulmonary benign metastasizing leiomyoma

Abstract

Pulmonary benign metastasizing leiomyoma (PBML) is defined as metastasis of a leiomyoma to lung tissue. It was first reported i n 193 7. P BML is k nown a s a benign d isease, b ut c an u ndergo m alignant t ransformation. Only 1 case of the malignant transformation of PBML to leiomyosarcoma has been reported previously. In this report, we present a case of malignant transformation of PBML.