Blade of grass sign in Paget's disease
An elderly female complaining of leg pain. Serum alkaline phosphatase is markedly elevated.
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A well defined and wedge shaped lytic lesion in the right femoral diaphysis is seen, with no evidence of periosteal reaction and cortical disruption.
Findings are consistent with osteolytic phase of Paget's disease.
The blade of grass or the flame sign is a wedge- or V-shaped radiolucency typically located in diaphysis of long bones such as femur and tibia.