Tubercle of Assaki

Case contributed by Krzysztof Nocoń
Diagnosis not applicable


History of shoulder dislocation six months prior. Suspicion of rotator cuff injury.

Patient Data

Age: 25 years
Gender: Female

The articular cartilage is thinned at the central part of the glenoid cavity and forms a small pit - the bare glenoid area. Beneath that, the subchondral bone of the glenoid forms a small bump with no additional pathological changes of bone marrow.

The findings suggest an anatomical variant - the tubercle of Assaki.

Case Discussion

Glenoid bare area is probably an aging-related phenomenon and is found in roughly 80-88 percent of adult cadavers.

The tubercle of Assaki is a variation of the bare area of yet unknown incidence.

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