Benign giant cell tumor or localized osteitis fibrosa cystica.
D001859:Bone Neoplasms; D018212:Giant Cell Tumor of Bone; D005870:Giant Cell Tumors; D015726:Giant Cells; D006801:Humans; D009369:Neoplasms; D010002:Osteitis Fibrosa Cystica; D010329:Patella
PATELLA; TUMORS, GIANT CELL