title: Snapping knee caused by medial meniscal cyst.
abstract: Snapping phenomenon around the medial aspect of the knee is rare. We present this case of snapping knee caused by the sartorius muscle over a large medial meniscal cyst in a 66-year-old female. Magnetic resonance images demonstrated a large medial meniscal cyst with a horizontal tear of the medial meniscus. Arthroscopic cyst decompression with limited meniscectomy resulted in the disappearance of snapping, and no recurrence of the cyst was observed during a 2-year follow-up period.
authors.affiliation: Department of Orthopaedic Surgery, Enshu Hospital, 1-1-1 Chuo, Naka-ku, Hamamatsu, Shizuoka 430-0929, Japan.
authors.forename: Tsuyoshi
authors.initials: T
authors.lastname: Ohishi
authors.affiliation: Department of Orthopaedic Surgery, Enshu Hospital, 1-1-1 Chuo, Naka-ku, Hamamatsu, Shizuoka 430-0929, Japan.
authors.forename: Daisuke
authors.initials: D
authors.lastname: Suzuki
authors.affiliation: Department of Orthopaedic Surgery, Enshu Hospital, 1-1-1 Chuo, Naka-ku, Hamamatsu, Shizuoka 430-0929, Japan.
authors.forename: Kazufumi
authors.initials: K
authors.lastname: Yamamoto
authors.affiliation: Department of Orthopaedic Surgery, Enshu Hospital, 1-1-1 Chuo, Naka-ku, Hamamatsu, Shizuoka 430-0929, Japan.
authors.forename: Tomohiro
authors.initials: T
authors.lastname: Banno
authors.affiliation: Department of Orthopaedic Surgery, Enshu Hospital, 1-1-1 Chuo, Naka-ku, Hamamatsu, Shizuoka 430-0929, Japan.
authors.forename: Hiroki
authors.initials: H
authors.lastname: Ushirozako
authors.affiliation: Koide Clinic, Kosai, Shizuoka 431-0442, Japan.
authors.forename: Yoichi
authors.initials: Y
authors.lastname: Koide
authors.affiliation: Department of Orthopaedic Surgery, Hamamatsu University School of Medicine, Hamamatsu, Shizuoka 431-3192, Japan.
authors.forename: Yukihiro
authors.initials: Y
authors.lastname: Matsuyama