Congenital pseudoarthrosis of the clavicle

What it means

The two portions of the clavicle (corresponding to the two primary ossification centers of the clavicle) are connected by a fibrous bridge that is contiguous with the periosteum, and a synovial membrane develops, resulting in a clavicle with a bipartite appearance radiographically. Congenital pseudarthrosis of the clavicle generally presents as a painless mass or swelling over the clavicle.

In congenital pseudarthrosis of the clavicle, the two primary ossification centers fail to unite, probably due to a disruption of diaphyseal membranous ossification. See PMID:22295044, Figure 1, for the radiographic appearance of this feature.

Rare diseases that can present with this4

The range is how often this sign appears among people diagnosed with each disease — it is not a probability of having any of them. Many of these signs also occur in common, non-rare conditions. A sign on this page is a conversation to have with a clinician, not a conclusion.

Part of the broader category

Also called: Bipartite clavicle · Clavicle pseudoarthrosis · Pseudoarthrosis of clavicle