Symptoms of Femoral Neck Stress Fracture
Femoral neck stress fractures typically present with insidious onset of groin, anterior hip, or thigh pain that worsens with weight-bearing activity and improves with rest, often occurring in athletes or patients with osteoporosis.
Clinical Presentation
The key symptoms to identify include:
- Pain location: Groin, anterior hip, or proximal thigh pain
- Pain pattern: Insidious onset that progressively worsens with activity
- Activity-related: Pain increases with weight-bearing, running, or jumping
- Rest relief: Symptoms improve or resolve with rest
- Night pain: May develop as the fracture progresses
Critical Risk Stratification
Understanding the fracture type is essential because it directly impacts morbidity and mortality 1:
High-Risk Features (Lateral/Tension-Type)
- Lateral femoral neck stress fractures are inherently unstable and prone to displacement 1
- These require urgent recognition as they often necessitate percutaneous screw fixation 1
- If not promptly identified, they carry increased rates of:
Lower-Risk Features (Medial/Compression-Type)
- Medial compression-type femoral neck stress fractures are lower risk 1
- Can typically be managed with non-weight-bearing regimen 1
High-Risk Patient Populations
Be particularly vigilant in:
- Athletes (femoral neck stress fractures represent up to 7% of all stress fractures) 1
- Patients with osteoporosis
- Patients on bisphosphonate therapy 1
- Elderly patients
These populations are prone to fracture completion if not identified and managed promptly 1.
Common Pitfalls
The most critical pitfall is delayed diagnosis, which can lead to progression from incomplete to complete fracture with devastating complications including avascular necrosis 1. Initial radiographs are often negative, so maintain high clinical suspicion based on symptoms alone. MRI without IV contrast is the preferred second-line study after negative radiographs to prevent delayed diagnosis 1, given its excellent sensitivity and ability to demonstrate bone marrow edema and fracture lines early.
Patients may present with vague hip or groin discomfort that can be mistaken for muscle strain or hip joint pathology, leading to continued weight-bearing and fracture progression 1.