Hip Microinstability: Understanding a Newly Defined Hip Pathology in Young Athletes

What is currently understood about hip microinstability in young athletes — its causes, how it is identified, and how it is managed?

Young athletes with hip pain attributed to microinstability; no sample size reported (narrative review)

Narrative/clinical review synthesizing anatomy, contributing factors, diagnostic testing, and treatment options; no comparison group — what this means or follow-up — what this means period

• No quantitative results are reported — the article summarizes contributors to microinstability including borderline acetabular dysplasia, capsuloligamentous laxity — what this means or surgical capsular defects (notably iliofemoral ligament), labral injury with loss of the suction seal, and weakness or imbalance of hip musculature
• Described examination tests include anterior apprehension, prone instability — what this means, axial distraction, and abduction — what this means-hyperextension-external rotation; imaging signs include borderline dysplasia, head-neck cliff sign, elevated femoral-epiphyseal acetabular roof index, and capsular thinning or defects on MR arthrography; intra-articular anesthetic injection is described as confirmatory
• Authors present rehabilitation targeting the dynamic hip stabilizers as the first-line approach, with labral and capsular surgery reserved for persistent symptoms; no outcome data or success rates are given

This review positions strengthening of the dynamic hip stabilizers as the primary conservative approach for suspected hip microinstability, but it offers expert synthesis rather than measured outcomes.