Presentation
Case of right wrist ulnar side pain. An incidental finding is present.
Patient Data
Age: 30 years
Gender: Male
From the case:
Reversed palmaris longus muscle
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The right wrist and distal forearm reveal a muscle echopattern structure which shows continuity with a tendon in the mid-proximal forearm. At the level of the wrist, it is outside the carpal tunnel and ulnar to the flexor carpi radialis tendon.
The contralateral side shows a normal palmaris longus tendon at the wrist.
Case Discussion
The case shows a reversed palmaris longus muscle. The muscle belly is located in the distal forearm and its tendon in the proximal-mid forearm.
The most common variation of the palmaris longus is an absent muscle1. Other variations are reversed, duplicated, bifid, or hypertrophied palmaris longus muscles1.
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