etiology

Definition

Calcaneal apophysitis 

- overuse injury

- stress fracture in secondary growth center of calcaneum

Epidemiology

4/1000

Boys > girls

10 - 12

Femoral Neck Stress Fractures

Aetiology

Athletes with increase activity / distance

Women with eating disorders /  amenorrhea

Types

Compression / inferior neck

- < 50% protective weight bear

- > 50% emergent ORIF

Tension side / superior neck

- emergent ORIF

Epidemiology

Ranges

- up to 4%

Clinical

Focal pain

- typically anterolateral thigh

- often tender

- corresponds to tip of stem

Aetiology

1.  Instability

Types

- early

- late / failed bony ingrowth

Cause

- micromotion at distal stem