Supracondylar fracture


  • A 7 years old boy
  • alleged fall and left elbow pain.
  • TRO left supracondylar fracture.
Radiograph of left elbow in AP and lateral projection

Radiographic findings:

  • There isĀ  supracondylar fracture with subtle fracture line seen (yellow arrows)
  • The humeral condyles appear posteriorly angulated.
  • Elevated anterior fat pad (red arrow).
  • Presence of posterior fat pad (white arrow)
  • The anterior humeral line not passing through the capitellum indicating that the condyles are displaced posteriorly.
  • No dislocation of radius as evidenced by intact radiocapitellar line.
  • No intraarticular loose body noted.

Radiological diagnosis: Supracondylar fracture of left humerus.


  • Supracondylar humeral fractures are typically seen in young children, peak age of 5-7 years
  • These fractures are commonly seen in boys.
  • These injuries are almost always due to trauma.
  • Lateral and AP radiographs are usually sufficient to demonstrate an obvious fracture.
  • However, often fracture line cannot be seen in this type of fracture.
  • Indirect signs of fracture include
    • Anterior fat pad sig (sail sign)-anterior fat pad is elevated and appears as a lucent triangle on lateral projection
    • Posterior fat pad sign
    • Anterior humeral line do not intersect middle third of capitellum
Author: radhianahassan