Abstract
Symptomatic ganglion cysts within the knee joint are rare, and the mainstay of treatment for these cases has been surgical excision. We present a case of a ganglion cyst of the anterior cruciate ligament (ACL) treated with ultrasound-guided aspiration in an outpatient clinic. A 45-year-old woman presented to the hospital with posterior right knee pain after falling down. We were able to identify well circumscribed 2.2cm mass confined to ACL on Magnetic resonance imaging (MRI). We performed percutaneous needle aspiration of the ACL ganglion cyst under ultrasound (US) guidance. The patient's symptoms improved immediately after the procedure and she had no complications. Four weeks later, follow-up revealed that the patient's symptoms had disappeared. Six months later, a recurrence of a ganglion cyst was confirmed on follow-up and was treated in the same way.
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