Subradiological cam deformity of the head-neck junction: an occult cause of XXXX and @entity16 .

@entity1 @entity135 @entity558 @entity16 @entity4822 @entity158 @entity1172 @entity2096 @entity130
PURPOSE: The goal of this study was to determine how frequently the conventionally defined "idiopathic" @entity4822 are associated with subradiological cam deformities of the head-neck junction and whether a protective femoral osteochondroplasty may improve the outcome of their arthroscopic treatment. METHODS: All the non-arthritic or pre-arthritic @entity158 hips diagnosed as having a primary @entity130 were retrospectively evaluated. Coxometric data, clinical history and physical findings were reviewed to rule out any possible secondary lesion. The medical records of the selected cases were analyzed as for imaging features, surgical findings and post-arthroscopy outcome. RESULTS: Three cases out of 79 @entity130 were identified as "primary" on the basis of the preoperative assessment. All the three @entity1 were female in their fourth decade and showed a @entity16 consistent with undetected cam FAI (cartilage delamination in the anterolateral acetabular quadrant, minor pathology of the adjacent labrum with or without @entity1172 , abrasion signs and @entity558 along the anterolateral head-neck junction). The first @entity1 received a simple chondrolabral treatment whose benefits deteriorated few months after surgery; the second @entity1 underwent @entity2096 and is still pain-free; and the third @entity1 had a beneficial revision arthroscopy for femoral osteochondroplasty after prior unsuccessful chondrolabral surgery. CONCLUSIONS: If a @entity130 of the hip is associated with MR arthrographic and arthroscopic indirect signs of cam FAI, a subradiological @entity135 should be considered despite normal alpha angles. In such cases, a protective femoral osteochondroplasty may increase the success rate of the chondrolabral repair. LEVEL OF EVIDENCE: IV.
