Neck of femur fractures is the most common fractures in elderly people as they present with osteoporosis. These are intracapsular fractures and are associated with low-energy trauma like falls. It also occurs in young population due to motor vehicle accident and fall from height. Risk factors for the neck of femur fractures are female gender, immobility, and decrease mineral density. It accounts for 1.6 million hip fractures annually. About 90% of proximal femur fractures are of the neck of the femur including trochanteric fractures, more common in females than males over the age of 50 years. They consist of 2% of proximal femur fractures in 50 years below age group ^[1]. High rate of mortality is seen in patients with hypertension, mental illness (schizophrenia and parkinsonism), cardiac disease, renal insufficiency, diabetes, and smoking ^[2]. There is a higher chance of proximal femur fracture in a schizophrenic patient as there is a loss of bone mineral density due to a drug-induced increase in the level of prolactin and immobility ^[3]. Patients with Parkinson’s disease were at higher risk for the development of hip fractures due to gait disturbances and instability. It is associated with motor symptoms such as muscular rigidity, resting tremors, bradykinesia, postural, and gait impairment. As there is an increased frequency of falls in Parkinson’s disease patients, the risk of fracture is also increased. These patients also have osteoporosis due to immobilization, reduced activity, and Vitamin D deficiency ^[4]. The treatment options available for these patients include CC screw fixation, dynamic hip screws (DHS) plating, bipolar hemiarthroplasty, and total hip replacement. Operative management helps in early mobilization and reduces chances of pulmonary infection, bedsore, and deep vein thrombosis. Patients with parkinsonism have higher chances of dislocation and implant failure after total hip replacement and bipolar hemiarthroplasty. Another option for the management of neck femur fracture in elderly patient associated with schizophrenia and parkinsonism is total hip replacement using dual mobility prosthesis and tension band wiring (TBW) if there is a greater trochanteric (GT) fracture, which helps in early mobilization and prevents post-operative complication like dislocation ^[4]. Primary total hip replacement for the treatment of neck of femur fracture with GT fracture in elderly patient with parkinsonism and schizophrenia is difficult to perform due to distorted anatomy, a poor bone stock which poses problems during the femoral cut, cementing, and implantation. Nowadays, with the improved implant designs, it is possible to perform these types of surgeries with minimal complications.

A 63-year-old male patient came with complaints of the right arm pain, swelling, deformity of the right arm, and difficulty in extending the wrist for 3 days. The patient had a history of falls and trauma to the left arm at home. The patient had gone to some hospital where they had given slab and referred to our institute. On examination, the deformity was present in the right arm with wrist drop and mild tenderness in the right hip. X-ray right arm showed distal one-third spiral humerus fracture (Fig. 1a, b). The patient was a known case of parkinsonism, schizophrenia, and hypertension on medications. The patient was operated on with humerus nailing and radial nerve exploration was done by the plastic surgeon, which was intact (Fig. 2a, b). X-ray and computed tomography scan of the pelvis with both hips showed right neck of femur fracture with associated GT fracture (Fig. 3, 4). As the patient was old requiring early mobilization had pain and difficulty in walking, we planned for total hip replacement surgery with a dual mobility cup as the patient was a high risk for dislocation.

The patient was operated on in a lateral position under spinal anesthesia using the posterior approach. Initially, acetabular preparation was done, then the cerclage wires passed in the medial cortex of the proximal femur after the drilling using k-wires and then passed under the vastus lateralis muscle (Fig. 5).

The femoral preparation was done using sequential rasps. The cemented total hip arthroplasty was done using Zimmer implant of the acetabulum (cotyle double mobilite size of 56–57), femoral component (femoral stem size of 13 and femoral head size of 28), and dual mobility polyethylene liner for the head 28 and cup 56–57. After the implant fixation and hip reduction, the TBW was passed from the tip of the GT through the abductors and distally taken out from the lateral cortex of the femur. Now, both the cerclage wires and TBW were tightened together. Intraoperatively, stability of the hip and the GT was stable. After putting the drain, the wound was closed in layers. The post-operative X-ray showed well-fixed femoral and acetabular components with proper inclination (Fig. 6). Weight-bearing was started from the 2nd post-operative day with the walker. After 1.5 years of follow-up, the patient is now comfortable with no pain and difficulty in walking and showing fracture union and bony in growth around stem and acetabular cup (Fig. 7). The patient has a good range of motion at the hip. The functional outcome is good as per Harris’s hip score.

Fractures around the hip in elderly osteoporotic patient with parkinsonism and schizophrenia are challenging. Risk factors for the neck of femur fractures are female gender, decrease in mobility, and decrease mineral density ^[1]. High rate of mortality is seen in patients with hypertension, mental illness (schizophrenia and parkinsonism), cardiac disease, renal insufficiency, diabetes, and smoking ^[2]. There are high chances of hip fracture which is seen in schizophrenic patients as there is the loss of bone mineral density due to a drug-induced increase in the level of prolactin and immobility , As is seen in our case ^[3]. Various treatment options for the neck of femur fracture are CC screw fixation, DHS plating, bipolar hemiarthroplasty, and total hip arthroplasty. Initially, bipolar hemiarthroplasty was not recommended for the neck of femur fracture with Parkinson’s disease due to the high mortality rate and chances of dislocation [4, 5]. Another option for patients with Parkinson’s disease and schizophrenia is total hip arthroplasty using a dual mobility cup which prevents dislocation and reduces further complication. Bassiony et al. ^[4] in their study used a dual mobility cup in patients with a neurological deficit (Parkinson’s disease) and concluded that a dual mobility cup is a good option for patients with instability and obtained good functional outcome. According to Coughlin and Tempelton ^[5], very poor results, there was seen after arthroplasty in patients with Parkinson’s disease who were not mobilized in the 1st week after surgery (37% dislocation, 49% of pressure ulcers, and 75% mortality). As in our case, we mobilized the patient within a week after surgery. Karadsheh et al. ^[6] in their study did internal fixation for valgus impacted neck fracture in parkinsonism patients and concluded that they are at higher risk of fixation failure as in our case, we did dual mobility total hip arthroplasty considering the age of patient, type of fracture, and chances of dislocation. According to Gaillard et al. ^[7], dual mobility articular surfaces are better than traditional bearing surfaces as they provide good stability and a high survival rate in both primary and revision surgeries. Onochi et al. ^[8] in their study used freedom constrained liner for recurrent dislocation, in a schizophrenic patient who underwent dual mobility total hip arthroplasty already and concluded that freedom liner may provide salvage solution for joint instability in dual mobility total hip arthroplasty as in our case till the time no history of dislocation. Gianluca et al. ^[9] found that dual mobility total hip arthroplasty in femur neck fracture has good clinical outcome and low rate of dislocation. The proper wise selection of implants, meticulous soft-tissue dissection, and surgery help in getting a better outcome in patients with neck of femur fracture with GT fracture with parkinsonism and schizophrenia requiring a total hip replacement.

Neck femur fractures in elderly patients with associated comorbidities such as schizophrenia and parkinsonism are best managed with total hip replacement using a dual mobility cup. It avoids the risk of dislocation in high-risk patients and prevents secondary procedures. Careful clinical and radiological examination of the pelvis is very essential even in asymptomatic patients with a history of trauma to prevent delayed diagnosis of these types of fractures in patients with schizophrenia and parkinsonism.

Dual mobility cup is essential in patients with schizophrenia and parkinsonism undergoing total hip replacement which avoids the risk of dislocation.