Diagnosis

Intact posterior arch, innominate bone avulsion (AO/OTA 61A1) 

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1. Avulsion fractures of an iliac or pubic spine 
2. Avulsion fractures of the iliac crest 
3. Avulsion fractures of the ischial tuberosity  

1. Avulsion fractures of an iliac or pubic spine 

Avulsion fractures of an iliac or pubic spine

These injuries are avulsion fractures involving the:

  • anterior superior iliac spine (AO/OTA 61A1.1)
  • anterior inferior iliac spine  (AO/OTA 61A1.2)
  • pubic spine (pubic tubercle) (Not classified in the AO/OTA classification)

2. Avulsion fractures of the iliac crest 

Avulsion fractures of the iliac crest

These injuries are avulsion fractures of the iliac crest.
(Not classified in the AO/OTA classification)

3. Avulsion fractures of the ischial tuberosity  

Avulsion fractures of the ischial tuberosity

These injuries are avulsion fractures of the ischial tuberosity. This fracture is classified as an AO/OTA 61A1.3 fracture.