Imaging Case of the Week 191 Answer

The lateral c-spine x-ray shows the pars interarticularis fracture of the C2 vertebra, which is also known as the Hangman’s fracture. There is anterior subluxation of C2 over C3.

C2 pars interarticularis fracture

This is an unstable fracture and should be referred to the orthopaedic specialist from the ED with ongoing neck immobilisation.