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Saphenous Neuropathy Secondary to Extraneural Ganglion Cyst 15 Years After Reconstruction of the Anterior Cruciate Ligament
Author(s) -
Sole Joshua S.,
Pingree Matthew J.,
Spinner Robert J.,
Murthy Naveen S.,
Sellon Jacob L.
Publication year - 2014
Publication title -
pmandr
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.617
H-Index - 66
eISSN - 1934-1563
pISSN - 1934-1482
DOI - 10.1016/j.pmrj.2013.11.003
Subject(s) - medicine , ganglion cyst , saphenous nerve , cyst , anterior cruciate ligament , surgery , magnetic resonance imaging , anterior cruciate ligament reconstruction , knee pain , adductor canal , ankle , anatomy , radiology , osteoarthritis , pathology , alternative medicine , total knee arthroplasty
This case report describes a 43‐year‐old woman with a previous anterior cruciate ligament reconstruction and medial meniscectomy who presented with right knee dysesthesias radiating into her medial ankle with associated allodynia. An extensive work‐up was pursued, without a definitive diagnosis found or improvement in the patient's symptoms. Eventually, she was referred to Pain Medicine for an ultrasound‐guided saphenous nerve (SN) block, where a scan before the injection revealed a large cyst anteromedial to the sartorius in the expected location of the SN. Magnetic resonance imaging and surgical pathology confirmed a juxta‐articular ganglion cyst compressing the main SN, just above the take‐off of the infrapatellar branch. The cyst was successfully resected, with improvement noted in the patient's neuropathic symptoms postoperatively. Saphenous neuropathy is a rare condition, and to our knowledge this case is the first reported of saphenous neuropathy caused by a knee joint capsule−derived ganglion cyst.