bone tumour
osteoid osteoma
osteogenic tumor
Image Gallery
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)
histology :
- central nidus :
- connective tissue, with differentiating osteoblasts producing osteoid and sometimes bone, with or without osteoclasts
- surrounding sclerotic bone