Coracoclavicular distance

Last revised by Joshua Yap on 17 Jan 2024

The coracoclavicular (CC) distance is an indicator of the integrity of the coracoclavicular ligament.

The coracoclavicular distance is assessed on frontal radiography of the shoulder or clavicle or the coronal projection of a CT or MRI as the distance between the superior cortex of the coracoid process and the undersurface of the clavicle where the coracoclavicular ligaments insert.

A normal coracoclavicular distance is between 11-13 mm and there should be no greater than 5 mm difference between the left and right sides 1. It is relevant for the determination of the Rockwood type of acromioclavicular joint injury.

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