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Gout in the Flexor Hallucis Longus Tendon Mimicking Cellulitis: A Case Report

Jun Ohnishi Department of General Internal Medicine, Akashi Medical Center, Akashi, Japan

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Naoto Ishimaru Department of General Internal Medicine, Akashi Medical Center, Akashi, Japan

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Hiroyuki Seto Department of General Internal Medicine, Akashi Medical Center, Akashi, Japan

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Yohei Kanzawa Department of General Internal Medicine, Akashi Medical Center, Akashi, Japan

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Saori Kinami Department of General Internal Medicine, Akashi Medical Center, Akashi, Japan

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A 65-year-old Japanese man was admitted to our hospital with fever and inflammation of the right ankle. We initiated antibiotics on suspicion of cellulitis. After no clinical improvement, we performed magnetic resonance imaging, which showed a fluid collection in the flexor hallucis longus (FHL) tendon sheath. Synovial fluid analysis revealed monosodium uric crystals. Final diagnosis was FHL tendonitis secondary to gout proven by synovial fluid analysis. To our knowledge, this is the first case report of FHL tendonitis caused by gout. When ankle inflammation is examined in clinical situations, FHL tendonitis caused by gout should be considered.

Corresponding author: Naoto Ishimaru, MD, Akashi Medical Center, 743-33 Yagi, Ohkubo-Cho, Akashi, Hyogo 674-0063, Japan. (E-mail: maru-tkb@umin.ac.jp)
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