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Surgical Management of the Peroneus Quartus Muscle for Bilateral Ankle Pain

A Case Report

Nobuaki Chinzei Department of Orthopaedic Surgery, Kobe University Graduate School of Medicine, Kobe, Japan.

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Noriyuki Kanzaki Department of Orthopaedic Surgery, Kobe University Graduate School of Medicine, Kobe, Japan.

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Yoshinori Takakura Department of Orthopaedic Surgery, Takakura Orthopedic and Sports Clinic, Kobe, Japan.

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Yoshiyuki Takakura Department of Orthopaedic Surgery, Takakura Orthopedic and Sports Clinic, Kobe, Japan.

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Akihiko Toda Department of Orthopaedic Surgery, Kobe Kaisei Hospital, Kobe, Japan.

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Takaaki Fujishiro Department of Orthopaedic Surgery, Kobe University Graduate School of Medicine, Kobe, Japan.

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Shinya Hayashi Department of Orthopaedic Surgery, Kobe University Graduate School of Medicine, Kobe, Japan.

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Shingo Hashimoto Department of Orthopaedic Surgery, Kobe University Graduate School of Medicine, Kobe, Japan.

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Ryosuke Kuroda Department of Orthopaedic Surgery, Kobe University Graduate School of Medicine, Kobe, Japan.

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Masahiro Kurosaka Department of Orthopaedic Surgery, Kobe University Graduate School of Medicine, Kobe, Japan.

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The peroneus quartus muscle is an accessory muscle seen in the lateral compartment of the lower leg. Although the peroneus quartus muscle is asymptomatic in general, it sometimes becomes pathologic. We present the rare case of bilateral ankle pain with crepitation caused by the peroneus quartus muscle. Magnetic resonance imaging should be considered to assist with diagnosing this condition. Foot and ankle surgeons should consider it in the preoperative differential diagnosis when patients present with posterior ankle pain.

Corresponding author: Noriyuki Kanzaki, MD, PhD, Department of Orthopaedic Surgery, Kobe University Graduate School of Medicine, 7-5-1 Kusunoki-cho, Chuo-ku, Kobe 650-0017, Japan. (E-mail: kanzaki@med.kobe-u.ac.jp)