Michael P. D'Alessandro, M.D.
Peer Review Status: Internally Peer Reviewed
Benign tumor histologically identical to osteoid osteoma, but larger in size. Fifty percent of cases are in the spine's pedicles.
Plain film shows an expansile osteolytic lesion surrounded by thin peripheral rim of bone, 48% have a calcified central nidus, 50% excite a limited sclerotic reaction in adjacent structures, and 33% involve at least some part of a vertebral body.
Bone scan shows increased uptake.
CT shows a lucent lesion with a peripheral shell of bone and a calcified nidus.
See References Chapter.
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