A<unk>  is a focus of compact bone located in cancellous bone.
Benign entity that is usually found incidentally on imaging studies
Histologically,<unk> s are intramedullary foci of normal compact bone with haversian canals and "thorny" radiations that merge with the trabeculae of surrounding normal cancellous bone.
Most commonly identified in the pelvis, long bones, ribs, and spine.
Bone island
Skin appendage
Axial skeleton
Wound
Aura 
Capitate bone
Operon
Tissue 