Benign giant cell tumor of femur with bilateral multiple pulmonary metastases.

This paper presents the unusual case of a patient with a histologically benign giant cell tumor of the femur that resulted in bilateral multiple pulmonary metastases having the appearance of benign giant cell tumor. An aggressive surgical approach was used to eradicate the pulmonary metastases; 25 nodules excised from the left lung and 33 nodules from the right lung were proved histologically to be benign giant cell tumors. Three years after bilateral thoracotomies, he remains well, without evidence of recurrent disease, and his lung function is almost normal.