title: Reversed double PCL sign: unusual location of a meniscal fragment of the knee observed by MR imaging.
abstract: A 36-year-old woman with tears of the anterior cruciate ligament and medial meniscus received a meniscectomy. The MR images obtained prior to the partial meniscectomy showed a bucket-handle meniscal tear with centrally displaced fragment lying anterior to the posterior cruciate ligament (PCL), representing a "double PCL sign"; however, after the meniscectomy, MR images demonstrated a fragment in the space posterior to the PCL where no structure is generally recognized except for the ligament of Wrisberg. This article reports a "reversed" double PCL sign, caused by inadequate surgical clearance of a bucket-handle tear of the medial meniscus.
authors.affiliation: Department of Radiology, Institute of Clinical Medicine, University of Tsukuba, 305-8575 Tennodai, Tsukuba, Ibaraki, Japan. mniitsu@md.tsukuba.ac.jp
authors.forename: Mamoru
authors.initials: M
authors.lastname: Niitsu
authors.forename: Kotaro
authors.initials: K
authors.lastname: Ikeda
authors.forename: Yuji
authors.initials: Y
authors.lastname: Itai
mesh_terms: D000328:Adult; D001182:Arthroscopy / Q000009:adverse effects* / Q000379:methods; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D007718:Knee Injuries / Q000175:diagnosis / Q000601:surgery; D008279:Magnetic Resonance Imaging / Q000379:methods*; D008592:Menisci, Tibial / Q000000981:diagnostic imaging / Q000601:surgery*; D016119:Posterior Cruciate Ligament / Q000293:injuries / Q000473:pathology* / Q000601:surgery; D011183:Postoperative Complications / Q000175:diagnosis*; D011859:Radiography; D019651:Plastic Surgery Procedures / Q000379:methods; D012086:Reoperation; D012680:Sensitivity and Specificity; D012865:Skiing / Q000293:injuries