The following views were obtained in the suprapatellar region in the mid-longitudinal and transverse planes. There was no history of trauma or fever. The patient complained of swelling around the knee for the past 7 months.
What is the most likely diagnosis?
A. Hematoma
B. Abscess
C. Effusion
The most likely diagnosis is effusion.
Explanation
The mid longitudinal and transverse views shows a large anechoic collection in the suprapatellar recess region.
Figure – Mid longitudinal view (left) and suprapatellar transverse view (right) with a large anechoic (black) fluid collection.
Image courtesy of Wikipedia
Figure – Right knee. Observe the location of the patella, quadriceps tendon and femur.
References
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