Rare collarbone break study seeks answers from 30 patients

Copied word for word from the study's registry entry, so the wording is the study team's rather than ours.

Inclusion criteria (must meet all) : * Setting \& period: Managed at CHU de Brest (Orthopaedics-Traumatology) and operated for clavicle nonunion between 01/01/2000 and 31/12/2024. * Age: ≥ 18 years at the time of the index nonunion surgery. * Diagnosis: Clavicle pseudarthrosis (nonunion) documented in the record, defined as no clinical and radiographic union ≥6 months after the initial fracture, or radiographic signs of nonunion (e.g., gap, no bridging callus, sclerotic ends) with compatible symptoms. * Index treatment: Surgical management of the pseudarthrosis (e.g., osteosynthesis with/without bone graft, vascularized graft, other reconstructive technique). * Minimum data available: Pre- and/or peri-operative imaging confirming nonunion and at least one postoperative clinical and/or radiographic assessment (any timing). * Scope: Aseptic and/or septic clavicle nonunions are eligible. Exclusion / non-inclusion criteria (not eligible) * Legal protection: Adults under legal protection (sauvegarde de justice/curatelle/tutelle). * Patient objection: Any opposition to the use of their data. * Age \< 18 years. * Non-surgical management only of the nonunion (conservative treatment without surgery). * Acute fractures (\<6 months) without nonunion criteria, or delayed union without pseudarthrosis criteria. * Pathologic fracture (tumor/metastasis) or congenital clavicle pseudarthrosis. * Care outside the study period and/or outside CHU de Brest. Exclusion after initial selection (screen-fail after chart review) * Insufficient documentation to evaluate exposure and/or the primary outcome: no usable pre- or post-op imaging and no postoperative follow-up available (immediate loss to follow-up). * Early death unrelated to the condition/surgery before any postoperative assessment. * Unclassifiable infection status: suspected infection without microbiologic confirmation and without a clear therapeutic strategy, preventing classification as septic vs aseptic. * Major ipsilateral concomitant trauma making functional scores uninterpretable (e.g., severe brachial plexus injury, major scapulothoracic stiffness, recent shoulder arthroplasty). * Unresolved duplicates/inconsistent identifiers (same patient-same clavicle).