Os supratrochleare dorsale

Case contributed by Charlie Chia-Tsong Hsu
Diagnosis almost certain

Presentation

Trauma

Patient Data

Age: 20 years
Gender: Male
x-ray

An ovoid well-corticated bone ossicle (os supratrochleare dorsale) is present in the olecranon fossa. The os supratrochleare dorsale shows internal trabecular pattern. 

Case Discussion

In this case the patient is asymptomatic. Obermann and Loose1 in a small case series demonstrated symptomatic patients show post-traumatic changes of the os supratrochlear dorsale, while asymptomatic patients show a normal trabecular pattern (as demonstrated in the case).

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