Diagnostic Approach to Anterior Right Hip Pain with Limited Internal Rotation

Clinical Significance and Diagnostic Algorithm

The American College of Radiology recommends obtaining plain radiographs (AP pelvis and lateral hip) immediately as the first diagnostic test, then proceeding to MRI if radiographs are negative or equivocal, as this presentation strongly suggests either femoroacetabular impingement (FAI) or early hip osteoarthritis 1, 2
The preservation of full ROM in other planes makes extra-articular pathology (trochanteric bursitis, iliopsoas tendinitis) less likely, as these conditions typically present with different pain patterns and physical examination findings 1, 2
Order AP pelvis and lateral femoral head-neck views bilaterally to evaluate for hip osteoarthritis, FAI morphology (cam or pincer lesions), acetabular dysplasia, and occult fractures 1, 2
MRI should be the first advanced imaging technique after radiographs for detecting labral tears, early cartilage damage, bone marrow edema, and soft tissue pathology not visible on plain films 1, 2
Image-guided intra-articular hip injection with local anesthetic (with or without corticosteroid) definitively confirms the hip joint as the pain generator 1, 2

The American Academy of Orthopaedic Surgeons provides high-quality evidence with moderate strength recommendation supporting referral to physical therapy immediately for confirmed FAI or early osteoarthritis 3, 4
NSAIDs and acetaminophen provide symptomatic relief during the rehabilitation phase 4
Intra-articular corticosteroid injection can be considered for symptomatic relief (high-quality evidence, moderate strength recommendation), providing both diagnostic confirmation and therapeutic benefit 3, 4
Avoid hyaluronic acid injections, as high-quality evidence with strong recommendation states these should NOT be used for symptomatic hip osteoarthritis 4
Avoid opioids entirely for chronic hip pain, as consensus recommendations oppose their use for symptomatic hip osteoarthritis 4

Do not diagnose based on imaging alone—incidental findings are extremely common in asymptomatic individuals, and clinical correlation is essential 1
Do not assume this is primary hip joint pathology without imaging confirmation, as referred pain from the lumbar spine or sacroiliac joint can mimic hip pathology 1, 2