A 40-year-old male with history of psoriatic arthritis presented with left elbow swelling. Ultrasound of the left elbow at the olecranon fossa was obtained in longitudinal and transverse views, with the images below documenting the positive ultrasound findings. There was no history of injury to the elbow.
What is the most likely diagnosis?
A. Hematoma
B. Cellulitis
C. Olecranon fossa effusion
The most likely diagnosis is olecranon fossa effusion.
Explanation
Ultrasound of the left elbow shows a hypoechoic collection at the olecranon fossa suggestive of olecranon fossa effusion. For a more detailed explanation, please see the reference.
References
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