Purpose Hip pain is a common complain in orthopedics.Femoral acetabular impingement(FAI)syndrome is a relatively new clinical entity strongly linked with pain and early osteoarthritis of the hip in adults.A synovial herniation may be associated with the impingement.In order to have precise medical diagnosis in the early stage of pain,noninvasive multimodality medical imaging techniques were used to confirm injury to the acetabular labrum or adjacent articular cartilage Method Subsequent to plain film,CT and magnetic resonance imaging(MRI)arthrography(with gadolinium joint injection)combined with lab test were used in a 45 years old male patient who had a two more months persistent pain in left femoral neck with more worse in abduction and lifting leg.Results Femoral acetabular impingement synovial herniation was detected and differential diagnosis from angioma and tumor in the femoral head and neck was made.Conclusion MRI enables us an individualized,personalized precision medical imaging.It is able to detect underlying subtle anatomic variations of the femoral head-neck junction and acetabulum including femoral acetabular impingement synovial herniation.