Osborne-Cotterill-Läsion

nach Ellenbogenluxation: Die Röntgenaufnahme in Luxation zeigt die Beziehung des luxierten Radiusköpfchens zum dorsalen Aspekt des Condylus radialis. Die Computertomografie nach Reposition zeigt den großen, abgescherten Defekt mit schalenförmigen Fragmenten.

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Kleine

Osborne-Cotterill-Läsion mit Radiusköpfchenfraktur nach Luxation des Radiusköpfchens nach dorsal hinter das Capitulum humeri mit Impaktation dort. 2 sagittal reformatierte CT-Schichten: Man erkennt die Impression dorsal am Capitulum humeri und die kleine ossär Absprengung dort. Die Radiusköpfchenfraktur selbst ist nur wenig disloziert. Aktuell ist die Luxation komplett reponiert.

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Osborne-Cotterill

lesion • Multi-ligamentous injury of the elbow with instability - Ganzer Fall bei Radiopaedia

Feger J, Multi-ligamentous injury of the elbow with instability. Case study, Radiopaedia.org (Accessed on 26 Feb 2023) https://doi.org/10.53347/rID-75671 • CC by-nc-sa 3.0 (modified)

The value of

elbow arthroscopy in diagnosing and treatment of radial head fractures. Radial head fracture classified as a type IV fracture due to an Osborne-Cotterill lesion [arrow] and displacement of the anterior rim fragment of the radial head into the fossa olecrani [*]. a-c CT scans. d Arthroscopic loose body [LB] removal. e Result after partial resection of unstable anterior radial head [RH] fragments. f A second loose body was found at the dorsal capitellum [C] near the (g) Osborne-Cotterill lesion. h, i Postoperative x-rays demonstrated correct alignment of the elbow joint and complete removal of loose bodies

bmcmusculoskeletdisord.biomedcentral.com • CC-by-4.0

Radiopaedia • CC-by-nc-sa 3.0 • de

Osborne-Cotterill lesions represent a shear or depression fracture of the posteroinferior aspect of the capitellum and an avulsed fragment in posterolateral elbow most commonly seen in patients with chronic posterolateral rotatory instability.

Pathology

It is thought to be due to posterolateral subluxation or dislocation during hyperextension of the elbow joint which can result in kissing contusion or impaction of the anterior radial head into posteroinferior capitellum with resultant depressed fracture or contusion as well as in some instances avulsion of the humeral attachment of the lateral ulnar collateral ligament. The mechanism is similar to that of Hill-Sachs deformity and Bankart lesions in anterior shoulder dislocations.

History and etymology

Osborne and Cotterill first described an osteochondral fracture in the posterolateral margin of the capitellum with or without a defect in the radial head in patients with recurrent elbow joint dislocation and posterolateral instability in 1966. In 2008, Morrey et al. suggested the term "Osborne-Cotterill lesion" for this condition.