PMC3170747_01
A thick fibrous band crossing over the motor branch of the ulnar nerve was identified at the middle portion of Guyon's canal (indicated by the haemostat) (a) and (b). After the resection of the fibrous band, the deep motor branch of the ulnar nerve appeared decompressed (c).
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fig1
This fibrous band was isolated and excised, and neurolysis of the nerve was also performed (Figure 1).
The surgical scar eight months after surgery (a), when Froment's sign became negative (b).
AOP2011-321020.002.jpg
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fig2
At the final followup, eight months later, the patient had recovered full strength in the adductor muscle, Froment's sign was negative, and the prominence of the first metacarpophalangeal joint had disappeared (Figure 2).