Bewegungsapparat

cam impingement

  • more common in young men
  • typically bony protrusion, mostly located at the anterosuperior aspect of the femoral head-neck junction just lateral to the physeal scar
 
AP radiograph of the right hip showing a bump (arrow) at the antero-superior head-neck junction with atypical lateral extension of the epiphyseal line. Also note the presence of an os acetabuli.
 
Axial radiograph of the right hip. The deformity at the head-neck-junction (arrow) is rotated outward.
 
MR arthogram (coronal T1-GRE fatsat) showing contrast medium within a small longitudinal tear of the acetabular labrum.

Diskussion