Acute subperiosteal hematoma of iliac bone
Subperiosteal iliac hematoma may present acutely in adolescents or chronically in asymptomatic adults.
Acute: in adolescents , usually with history of recent fall, giving complaints of pain and limping due to crural nerve compression.
Chronic: incidental finding in asymptomatic adults.
CT: Chronic hematomas are usually unilateral or bilateral lenticular calcified lesions deep to iliacus muscle.
MRI: Acute hematomas are lenticular lesions deep to iliacus muscle, hyperintense on T1WI and T2WI images. A rim of blooming may be seen on GRE.
Plain Radiographs: calcified lenticular mass on the inner aspect of iliac bone.