Ganglion cysts of the distal vastus lateralis compartment
Anterolateral knee pain and swelling in a long-distance runner. History of previous arthroscopy (years ago).
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Though there was no clear history of trauma, a previous muscular injury may have given rise to these cysts. A possible alternative diagnosis is chronic iliotibial band friction syndrome with formation of a pseudobursa. Ganglion cysts arising from the quadriceps tendon have also been described, but there is no relation to this structure in this case.