obsolete_Malignancy in Giant Cell Tumor of Bone true Replaced by Mondo term MONDO_0006287, with which this term was previously merged. Use: http://purl.obolibrary.org/obo/MONDO_0006287 A malignant tumor that arises from the bone. It is characterized by the presence of an area of high grade sarcoma in an otherwise typical giant cell tumor (primary malignancy in giant cell tumor), or the presence of sarcoma in which the pre-existing giant cell tumor may or may not be apparent (secondary malignancy in giant cell tumor). EFO:1000347 giant cell sarcoma of bone giant cell tumor of bone, malignant (morphologic abnormality) malignancy in giant cell tumor of bone 3.88.0 malignant giant cell tumor of bone OSTEOCLASTOMA, malignant ICDO:9250/3 malignancy in giant cell tumor of the bone bone giant cell sarcoma Dedifferentiated giant cell tumor giant cell bone sarcoma DOID:4719 UMLS:C0334552 giant cell tumor of bone, malignant http://purl.obolibrary.org/obo/MONDO_0006287 NCIT:C4304 giant cell sarcoma of the bone