A Liposarcoma Arising in a Pulmonary Hamartoma, Coexisting With Benign Metastasizing Leiomyoma

Pulmonary hamartoma is a common benign tumor that rarely degenerates into malignancy. This report documents a unique case of pulmonary hamartoma with malignant transformation into well-differentiated liposarcoma, coexisting in proximity to pulmonary nodules representing benign metastasizing leiomyoma in a 60-year-old woman.