Pseudoarthrosis (differential)

Congenital
pseudoarthrosis of the tibia • Tibial pseudoarthrosis - neurofibromatosis type 1 - Ganzer Fall bei Radiopaedia
Dixon, A. Tibial pseudoarthrosis - neurofibromatosis type 1. Case study, Radiopaedia.org. (accessed on 21 Oct 2022) https://doi.org/10.53347/rID-10316 • CC by-nc-sa 3.0 (modified)
Pseudoarthrosis
(differential) • Congenital pseudoarthrosis of the clavicles - Ganzer Fall bei Radiopaedia
Riley P, Congenital pseudoarthrosis of the clavicles. Case study, Radiopaedia.org (Accessed on 19 Nov 2022) https://doi.org/10.53347/rID-32137 • CC by-nc-sa 3.0 (modified)
Pseudoarthrosis
(differential) • Neglected bilateral developmental hip dysplasia - Ganzer Fall bei Radiopaedia
El Deen M, Neglected bilateral developmental hip dysplasia. Case study, Radiopaedia.org (Accessed on 19 Nov 2022) https://doi.org/10.53347/rID-52340 • CC by-nc-sa 3.0 (modified)
Radiopaedia • CC-by-nc-sa 3.0 • de

A pseudoarthrosis (or pseudarthrosis/ false joint) is a mobile fracture nonunion.

Pathology

A fibrous, pseudosynovial capsule forms around the nonunion and viscous fluid fills the site that may simulate synovial fluid.

Differential diagnosis

Common post-traumatic locations include:

  • scaphoid waist
  • humeral shaft
  • clavicular shaft
  • distal tibial shaft
  • talar neck

See also