Prominent Conoid Tubercle

prominent conoid tubercle

The osseous density projecting from the inferior aspect of the clavicle represents an enlarged conoid tubercle making an accessory articulation with the coracoid process of scapula (coracoclavicular joint).
DD: Post-traumatic myositis ossificans of the coracoclavicular ligament.
Absent trauma history and the smooth corticated margin point to a congenital origin of this anomaly.

Reference: Youchum and Rowe’s Essentials of Skeletal Radiology. 2005

Credit: Dr Ahmed Haroun