Fig. 1
From: Multicentric, multifocal, and recurrent osteoid osteoma of the hip: first case report
After two-years history of left hip pain, the patient underwent pelvis CT scan revealing the synchronous presence of two intracortical bone lesions consisting of a radiolucent nidus with a central punctiform hyperdensity and sclerosis of the adjacent bone, located in the left anterior acetabulum (a, arrow) and femoral neck (b, arrow), suspicious for OO. A third smaller lesion of the posterior acetabulum, with the same imaging findings (c, void arrow) was initially overlooked