Assertion: primary tumor | /r/AtLocation | bone
Facets:
value: from bone-derived cells
type: OTHER
value: from tissues
type: TRANSITIVE-OBJECT
Source sentences:
text: Bone tumors may be classified as "primary tumors", which originate in bone or from bone-derived cells and tissues, and "secondary tumors" which originate in other sites and spread (metastasize) to the skeleton.