the tumors comprising the remaining three groups ( six tumors ) occurred in bone , demonstrated benign clinical behavior , and were grouped according to their close resemblance to tumors known to occur in bone , that is osteoblastoma-like ( four tumors ) , nonossifying fibroma-like ( two tumors ) , and ossifying fibroma-like ( one tumor ) .
C0262950
bone
C0029417
osteoblastoma