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Iliopsoas avulsion in a 90-year-old female with suspected joint effusion. Long-axis US at the level of the femoral head (A) shows a curvilinear echogenic lesion with marked shadowing (arrowheads) at the level of the femoral head, raising the possibility of an avulsed fracture fragment likely related to the iliopsoas. Radiographs were requested. AP radiograph (B) confirmed an avulsed bony fragment (arrowhead) along with a frank pathologic fracture of the proximal femoral diaphysis
