Asymptomatic
All age group
1-2 cm
Increase and decrease in size, and disappearance have been reported
Common: pelvis, femur and other long bones
More than 2 cm = giant bone island (common in pelvis); up to 10 cm have been reported
Pathology:
Well-defferentiated bone tissue within the marrow
Plain film:
Round or oval
Intramedullary
Homogneously sclerotic
brush borders/ radiating thorny spicules blend wit trabeculae
CT:
Sclerotic lesion with brush border
MR:
Low on both T1 and T2
Bone scan:
Hot on bone scan in less than 10%
DD:
Blastic mets
References:
Rodallec MH et al. Diagnostic Imaging of Solitary Tumors of the Spine: What to Do and Say. RadioGraphics 2008;28:1019-1041
