Femoroacetabular impingement mimicking avascular osteonecrosis on bone scintigraphy.
Femoroacetabular impingement (FAI) is a structural abnormality of proximal femur and/or acetabulum. It has been recently described, and there are limited reports in nuclear medicine literature because bone scintigraphy is not listed in its diagnostic protocol, but it should be included on differential diagnosis when evaluating patients, with hip-related symptoms because it may be misinterpreted as degenerative changes or avascular necrosis, and its early treatment avoid progression to osteoarthritis. We describe the case of a male who suffered from hip pain. Bone planar scintigraphic appearance mimicked avascular necrosis, but single photon emission computed tomography (CT) imaging and CT examination confirmed the diagnosis of FAI.
Department of Nuclear Medicine, Caceres Hospital, Cáceres, Spain.
Juan Pablo
JP
Suarez
Department of Nuclear Medicine, Caceres Hospital, Cáceres, Spain.
María Luz
ML
Domínguez
Department of Nuclear Medicine, Caceres Hospital, Cáceres, Spain.
Zulema
Z
Nogareda
Department of Nuclear Medicine, Caceres Hospital, Cáceres, Spain.
María Asunción
MA
Gómez
Department of Nuclear Medicine, University Medical Center, Orense, Spain.
Jose
J
Muñoz
Avascular osteonecrosis; bone scintigraphy; femoroacetabular impingement; hip