“ Cam lesions are more common in active young men and are due to a non-spherical part of the femoral head impacting against the acetabular r...
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Cam lesions are more common in active young men and are due to a non-spherical part of the femoral head impacting against the acetabular rim. Presents as chronic groin pain that is worse during exercise; clicking/locking suggests a labral tear.
Plain film
• Flattening of the femoral head-neck junction (‘pistol grip’ deformity)
• Osseous bump (either lateral or anterosuperior)
• Degenerative change
MRI
• Arthrography is preferred when labral tears are suspected, femoral neck is best assessed with axial oblique (angled along the axis of the femoral neck) and sagittal reformats.
• Classic triad: abnormal a angle (>65°), anterior-superior acetabular cartilage lesion and anterior superior labral tear.
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