Lateral Hip Pain Differential Diagnoses

Adult

Greater trochanteric pain syndrome (Gluteus medius dysfunction, Gluteus medius or gluteus minimus tendinopathy, Piriformis tendinopathy, Iliotibial tract friction syndrome, Trochanteric bursitis )
Traction enthesopathy or apophysopathy
Piriformis syndrome
Snapping hip syndrome
Meralgia paresthetica
Peripheral compressive neuropathy
Hip (femoroacetabular) osteoarthrosis
Femoroacetabular impingement
Acetabular labral pathology
Femoral head avascular necrosis
Femoral neck fracture
Femoral neck stress fracture
Iliopsoas tendinopathy
Sports hernia
Fibromyalgia
Myofascial trigger points
Complex regional pain syndrome
Lumbosacral spine disorders
Referred pain from intra-abdominal processes

Infectious
- Septic arthritis of the hip
- Septic arthritis of the sacroiliac joint
- Lyme disease
- Osteomyelitis of femoral head or pelvis
- Psoas abscess
- Appendicitis or abdominal/pelvic abscess
Inflammatory
- Transient synovitis
- Systemic arthritis
  - Spondyloarthropathy
  - Juvenile idiopathic arthritis (rare as isolated hip pain)
  - Kawasaki disease
  - Infectious/post-infectious
- Idiopathic chondrolysis of the hip
- Chronic recurrent multifocal osteomyelitis
Mechanical/orthopedic
- Slipped capital femoral epiphysis (SCFE)
- Avascular necrosis
  - Legg-Calve-Perthes disease
  - Secondary avascular necrosis
- Femoral stress fracture
- Muscular strain
Neoplastic/infiltrative
- Osetoid osteoma
- Leukemia
- Solid Tumor, primary or metastatic
- Pigmented villonodular synovitis
Other
- Sickle cell pain crisis