Case report 869. Benign metastasizing giant cell tumor of bone.

We presented a case of giant cell tumor of the sacrum with multiple pulmonary metastases in an 11-year-old girl. To the best of our knowledge, our patient is the youngest reported patient with a giant cell tumor with pulmonary metastases. Although giant cell tumor of bone with pulmonary metastases is extremely rare, this entity must be considered in the differential diagnosis of bone tumors.