Mediastinal and pulmonary metastases of malignant ossifying fibromyxoid tumor.

Ossifying fibromyxoid tumor is usually a benign tumor. However some of these tumors with histologic and clinical evidence of malignancy have also been reported and little information is available regarding surgery for metastatic ossifying fibromyxoid tumor. We present a case involving extensive excision of a huge metastatic ossifying fibromyxoid tumor occupying the upper mediastinum and upper half of the right hemithorax.