bone tumour
osteoid osteoma
osteogenic tumor
Digital slides
UI:857 - Osteoid osteoma
Definition: Osteoid osteoma is a benign bone-forming tumour with limited growth potential, inducing disproportionate pain
Clinical features
- pain with nocturnal exacerbation, relieved by salicylates and NSAID
- exquisite, localized tenderness
Localization
most common in long bones (femur)
virtually every bone (except sternum)
Radiology
dense cortical sclerosis around a radiolucent nidus
- rarely : target-like lesion (if central sclerosis)
Microscopy
- central nidus :
- connective tissue, with differentiating osteoblasts producing osteoid and sometimes bone, with or without osteoclasts
- surrounding sclerotic bone
See also
osteoid-forming lesions
bone-forming lesions