Abstract
A 45-year-old man was frequently bothered by a weakness of the right hand, and it was difficult for him to do adduction of the thumb for half a year. According to his presentation, the patient held his child by the right upper limb with wrist flexion habitually for a year. Besides, there was an obvious atrophy of the hypothenar eminence. In MRI image, there were two lobulated cyst lesions in the Guyon’s canal between the right hook of the hamate bone and the abductor digiti minimi muscle. During the surgery, the two lobulated cysts were in the Guyon’s canal, and the ulnar nerve was compressed. Three weeks after the tumor excision, the weakness of the right hand improved dramatically, and the patient could perform adduction of the right thumb to pinch paper easily without flexion of the interphalangeal joint.
Published Version
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