The usual classification of fractures is:

  • Intra-capsular – from the subcapital region of the femoral head to basocervical region of the femoral neck, immediately proximal to the trochanters
  • Extra-capsular – outside the capsule, subdivided into:
    • Inter-trochanteric, which are between the greater trochanter and the lesser trochanter.
    • Sub-tronchanteric, which are from the lesser trochanter to 5cm distal to this point.

Other terms used to describe these injuries are shown in the image.