Cerebral palsy is the most common childhood-onset neuromuscular disorder creating lifelong physical disabilities. It affects about 1 in 500 neonates with an estimated worldwide prevalence of 17 million. Cerebral palsy is not a specific disease, but a spectrum of clinical symptoms of permanent abnormalities of the development of movement and posture caused by non-progressive disturbances in a developing fetal or infant brain. Various musculoskeletal disorders are caused by cerebral palsy, hip displacement is one of the most common deformities, second only to equinus deformities of the foot and ankle.Based on the review of previous literatures, this paper summarized the pathophysiology, clinical symptoms, relationship with the gross motor functionclassification and orthopedic treatment of hip displacement in cerebral palsy. Hip displacement in cerebral palsy is mainly caused by the lack of normal stress stimulation in the early childhood and the continuous asymmetric muscle tone and muscle strength around the hip joint. Early hip displacement in cerebral palsy is usually asymptomatic, but without timely intervention hip subluxation/dislocation will cause hip pain and hip motion limitation and thus influence the patient's activity ability and increase the difficulty of daily caring. Hip displacement in cerebral palsy is closely related to the gross motor functionclassification, and the higher the classification of gross motor, the greater the risk of displacement, and hip monitoring can significantly reduce the incidence of hip dislocation. Therefore, a consensus has been reached that a standardized hip surveillance programs and timely intervention are important to prevent the occurrence of hip dislocation and pain. The surgical strategies for hip displacement in CP can be divided into three types: preventive surgery, reconstructive surgery and salvage surgery.

Cerebral palsy; Hip joint; Joint dislocations; Early medical intervention