Giant Cell Tumor of Bone

**Definition:** A bone tumor composed of cellular spindle-cell stroma containing scattered multinucleated giant cells resembling osteoclasts. The tumors range from benign to frankly malignant lesions. The tumor occurs most frequently in an end of a long tubular bone in young adults. (From Dorland, 27th ed; Stedman, 25th ed)

**Tree numbers:** - C04.557.450.565.380.380 - C04.557.450.565.575.420