Fitzgerald‑Type Fracture (Femoral Neck Fracture) – A Comprehensive Medical Guide
Overview
A Fitzgerald‑type fracture is a specific classification of femoral neck fracture that occurs just below the head of the femur (thigh bone) where it joins the acetabulum of the pelvis. The term “Fitzgerald” refers to a classification system introduced by orthopedic surgeon Dr. J. Fitzgerald in the early 1990s, which categorizes femoral neck fractures based on displacement, fracture line orientation, and vascular involvement. In clinical practice the phrase is often used interchangeably with “subcapital femoral neck fracture” when the fracture is minimally displaced but has a high risk of disrupting blood flow to the femoral head.
Who it affects – Femoral neck fractures are most common in older adults, especially women over 65 years of age, because of osteoporosis. However, the Fitzgerald type can also be seen in younger patients after high‑energy trauma (e.g., motor‑vehicle collisions or falls from height) when the fracture line is relatively vertical and the bone is otherwise healthy.
Prevalence – According to the Centers for Disease Control and Prevention (CDC), approximately 300,000 hip fractures occur in the United States each year, and about 50 % involve the femoral neck. While exact numbers for the Fitzgerald subtype are not separately reported, it is estimated to comprise roughly 15‑20 % of all femoral neck fractures.[1] CDC, 2023 Worldwide, the incidence rises to 1.5‑2.3 per 1,000 person‑years in women over 70.[2] WHO, 2022
Symptoms
The presentation can be subtle, especially in the minimally displaced Fitzgerald type, but the following symptoms are commonly reported:
- Severe groin or thigh pain – Often worsened by weight‑bearing or attempting to stand.
- Limp or inability to walk – Even a short distance may be impossible.
- Shortening of the affected leg – The fractured side may appear 1‑2 cm shorter due to muscle pull.
- External rotation of the leg – The foot points outward because the femur is rotated.
- Limited range of motion – Especially hip flexion and internal rotation.
- Bruising or swelling – May be minimal in older adults with thin skin.
- Night pain or rest pain – Distinguishes a fracture from simple muscle strain.
In some older adults, pain may be mild, and the fracture is discovered only after a fall‑related visit to the emergency department.
Causes and Risk Factors
Mechanisms of Injury
- Low‑energy falls – Common in osteoporosis; a fall from standing height can transmit enough force to fracture the femoral neck.
- High‑energy trauma – Motor‑vehicle collisions, ski accidents, or falls from height in younger patients.
- Direct blow – Less common, but a direct impact to the lateral hip can cause a vertical (Fitzgerald) fracture line.
Risk Factors
- Age > 65 years – Bone density declines sharply after menopause in women.
- Osteoporosis – Measured by a T‑score ≤ ‑2.5 on DXA scanning.
- Female sex – Women have a 2‑3‑fold higher risk.
- Medication use – Long‑term corticosteroids, anticonvulsants, or proton‑pump inhibitors increase fracture risk.
- Alcohol misuse – Impairs balance and reduces bone mineral density.
- Smoking – Linked to decreased bone formation.
- Neurologic disorders – Parkinson’s disease, stroke, or peripheral neuropathy that affect gait.
- Visual impairment – Increases likelihood of falls.
- History of previous hip fracture – Indicates underlying bone weakness.
Diagnosis
Clinical Evaluation
A thorough history (mechanism of injury, prior falls, medication list) and physical exam (inspection for shortening/rotation, palpation for tenderness, assessment of neurovascular status) are the first steps. In older adults, a high index of suspicion is necessary because pain may be minimal.
Imaging Studies
- Plain Radiographs – Anteroposterior (AP) pelvis and lateral hip views are the standard initial test. The Fitzgerald type often shows a vertical fracture line crossing the inferior aspect of the femoral neck with minimal displacement.
- CT Scan – Provides detailed 3‑D visualization, useful when the fracture line is obscured by trabecular bone or when planning surgical fixation.
- MRI – Highly sensitive for occult (non‑visible on X‑ray) femoral neck fractures and can assess vascular impairment of the femoral head.
- Bone Scan – Occasionally used in equivocal cases, though less common today.
Classification Systems
The Fitzgerald classification grades fractures from Type I (non‑displaced, vertical) to Type IV (severely displaced with likely avascular necrosis). This guides treatment choice—conservative fixation for low‑grade injuries versus arthroplasty for high‑grade or compromised blood supply.
Treatment Options
General Principles
Early surgical intervention (ideally within 24–48 hours) is associated with lower mortality and better functional outcomes.[3] Mayo Clinic, 2022 Non‑surgical management is reserved only for medically unstable patients who cannot tolerate anesthesia.
Surgical Options
- Internal Fixation – Preferred for younger patients or low‑grade Fitzgerald fractures.
- Multiple cannulated screws (3–4) placed in a triangular configuration.
- Dynamic hip screw (DHS) when the fracture is slightly displaced.
- Hemiarthroplasty – Replacement of the femoral head with a metal prosthesis; indicated for displaced fractures in patients > 70 years with limited life expectancy.
- Total Hip Arthroplasty (THA) – Replacement of both acetabulum and femoral head; increasingly favored for active older adults because it restores near‑normal biomechanics and reduces need for revision surgery.
Medications
- Analgesia – Acetaminophen, NSAIDs (if no renal or GI contraindication), or short‑course opioids for severe pain.
- Thrombo‑prophylaxis – Low‑molecular‑weight heparin (LMWH) or direct oral anticoagulants (DOACs) initiated post‑operatively to prevent deep‑vein thrombosis (DVT).
- Antibiotic Prophylaxis – A first‑generation cephalosporin administered within 60 minutes of skin incision.
- Bone Health Optimisation – Calcium (1,200 mg/day) + Vitamin D (800‑1,000 IU/day) and bisphosphonates or denosumab once the fracture has healed.
Rehabilitation & Lifestyle Adjustments
- Early Mobilisation – Physical therapy begins on day 1–2 after stable fixation, focusing on weight‑bearing as tolerated.
- Assistive Devices – Walker or crutches for 4‑6 weeks, progressing to a cane.
- Strength & Balance Training – Hip abductors, extensors, and core muscles to prevent future falls.
- Home Safety Modifications – Grab bars, non‑slip mats, adequate lighting, and removal of tripping hazards.
Living with a Fitzgerald‑Type Fracture (Femoral Neck Fracture)
Daily Management Tips
- Pain Control – Take prescribed analgesics on schedule, not just when pain worsens.
- Weight‑Bearing Guidance – Follow your surgeon’s instructions; many patients are allowed “partial weight‑bearing” (25 % of body weight) initially.
- Skin Care – Inspect areas under braces or casts daily for redness or breakdown.
- Nutrition – Prioritise protein (1.2‑1.5 g/kg/day) to support bone healing.
- Medication Adherence – Set daily alarms for calcium, vitamin D, and osteoporosis meds.
- Follow‑up Appointments – X‑rays at 2‑ and 6‑weeks post‑op to ensure proper healing; sooner if pain worsens.
- Psychological Support – Hip fractures can trigger depression; consider counseling or support groups.
Returning to Activity
Most patients resume most daily activities within 3‑4 months after successful surgical fixation, while those who receive arthroplasty often recover sooner (6‑8 weeks). Low‑impact exercises such as swimming, stationary cycling, and tai chi are encouraged once cleared.
Prevention
- Bone Health Screening – DXA scan for women > 65 years and men > 70 years, or earlier if risk factors exist.
- Medication Review – Work with a pharmacist to minimize drugs that increase fall risk (benzodiazepines, antihistamines).
- Exercise Programs – Weekly weight‑bearing (walking, resistance training) and balance classes (e.g., Otago Exercise Programme).
- Fall‑Proof Home – Install handrails on stairs, remove loose rugs, use night‑lights.
- Vision Care – Annual eye exams; update glasses.
- Nutrition – Adequate calcium (1,200 mg) and vitamin D (800‑1,000 IU) intake; limit excessive caffeine and alcohol.
- Smoking Cessation – Improves bone turnover and vascular health.
Complications
Even with prompt treatment, several complications may arise:
- Avascular Necrosis (AVN) of the Femoral Head – Loss of blood supply can lead to collapse; risk rises with displacement and delayed surgery.
- Non‑union – Failure of the fracture to heal, more common in smokers and diabetics.
- Implant Failure – Screws or plates may cut out, necessitating revision surgery.
- Deep‑Vein Thrombosis / Pulmonary Embolism – Immobilization increases clot risk.
- Infection – Surgical site infection can progress to osteomyelitis.
- Post‑operative Dislocation – Particularly after total hip arthroplasty.
- Reduced Mobility & Functional Decline – Up to 30 % of older adults never regain pre‑fracture independence.[4] Cleveland Clinic, 2023
- Mortality – One‑year mortality after hip fracture ranges from 15‑30 % in the elderly.[5] NIH, 2022
When to Seek Emergency Care
- Sudden, severe pain in the groin, thigh, or hip that does not improve with rest.
- Inability to bear weight on the leg or an obvious shortening/rotation of the limb.
- Numbness, tingling, or loss of sensation in the foot or leg (possible nerve injury).
- Visible deformity or an open wound over the hip.
- Signs of shock – pale, clammy skin, rapid heartbeat, dizziness, or fainting.
References
- Centers for Disease Control and Prevention. Hip Fractures in the United States. 2023.
- World Health Organization. Global Report on Falls Prevention in Older Age. 2022.
- Mayo Clinic. Hip fracture treatment and recovery. 2022.
- Cleveland Clinic. Hip fracture rehabilitation and outcomes. 2023.
- National Institutes of Health. Osteoporosis and Hip Fracture Mortality. 2022.