Accessory abductor digiti minimi muscle (hand)

Case contributed by Dr Maulik S Patel


An incidental finding.

Patient Data

Age: 45 years
Gender: Female

There are two hypoechoic muscle slips crossing the Guyon's tunnel. They have a common origin in the midline wrist and extend to the ulnar palmar region to join the abductor digiti minimi muscle. The two slips encase the patent ulnar artery. The deeper slip separates the ulnar artery from the ulnar nerve. The ulnar nerve shows a normal echopattern without edema.

Case Discussion

The ultrasound shows an accessory abductor digiti minimi muscle which is one of the common accessory muscles.

MRI is not available for comparison.

PlayAdd to Share

Case information

rID: 85395
Published: 10th Mar 2021
Last edited: 13th Mar 2021
Inclusion in quiz mode: Included

Updating… Please wait.

 Unable to process the form. Check for errors and try again.

 Thank you for updating your details.