xray

Atypical Femur Fractures

Atypical Femur FracturesAtypical femur fracture xray

 

Site

 

Subtrochanteric

Lateral femoral shaft

 

Aetiology

 

Stress fractures

 

Associated with long term bisphonate use

 

Bisphosphonates

 

Black et al. NEJM 2020

- reduction of hip fracture risk v risk of atypical femur fracture

- 10 year period

Transient Osteoporosis Hip

Definition

 

Self limiting syndrome of unknown aetiology

- hip pain associated with osteoporosis of proximal femur 

 

DDx

 

AVN

- AVN of the hip in pregnancy is rare but possible

- TOH tends to be diffuse on MRI, while AVN is localised

- extends to neck and metaphysis

- transient osteoporosis has normal bone scan

 

Incidence

 

Rare

- M: F 3:1

Background

Bilateral Hip AVN Xray

 

Definition

 

Non-traumatic or traumatic condition of femoral head with bone death

 

Epidemiology

 

20 - 50 yo (average 38)

- M: F 4:1

 

NHx  

 

70-80% with AVN will progress within 1 year

 

Hammer Toe

Definition 

 

Flexion deformity PIPJ with

- MTPJ normal / simple

- MTPJ hyper-extended / complex

- DIPJ any position

- P1 may become subluxed or dislocated

 

Aetiology

 

Uncertain

 

Long second toe / MT

Hallux valgus

Tight shoes

 

Examination

 

Claw Toe

Definition

 

Hyperextension of MTPJ and PIPJ / DIPJ flexion

- usually all toes affected 

 

Claw Toes

 

DDx

 

1.  Complex hammer

- hammer toe with MTPJ extension

- hammer usually affects second toe

 

2.  Curly toe

Fracture

Epidemiology

 

Young men

 

Aetiology

 

FOOSH

- axial load, dorsiflexion and radial deviation

 

DISI occurs in ulna deviation

 

Herbert Classification

 

Type A    Stable acute fracture

 

A1 Tubercle