PMC8650666_01
(a) Lateral and (b) dorsal topographic anatomy of the patient. "Blue asterisk" demonstrates transferred flexor carpi ulnaris muscle. "Red asterisk" indicates the mass at the tendon transfer region. "Black asterisk" shows previous loss of extensor muscles and tendons.
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F1
Thus, the patient underwent a tendon transfer surgery in which the FCU tendon was transferred to EDC tendon (Figure 1).
A magnetic resonance imaging scan of wrist mass. (a) Proton density-weighted and (b) fat-suppressed T1 images showing iso/hypointense mass located on the dorsal side of ulna.
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F2
Magnetic resonance imaging (MRI) revealed an iso/hypointense mass at proton density-weighted and fat-suppressed T1 images (Figure 2).
(a) An intraoperative image of gout tophus. (b) "White arrow" indicates the retained non-absorbable suture material within the mass.
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F3
Non-absorbable suture materials were observed within the tendon transferred region (Figure 3).
A microscopic image showing a typical granuloma of a gouty tophus. Amorphous material in fibrotic synovium is surrounded by foreign body giant cells, histiocytes, and lymphocytes (H-E, x40).
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F4
At the periphery, fibrotic synovium was visible (Figure 4).