Trigger thumb

Case contributed by Maulik S Patel
Diagnosis certain


Right thumb pain and recurrent locking for the last few months. No history of trauma.

Patient Data

Age: 70 years
Gender: Female

There is a hypoechoic thickening of A1 pulley at the thumb MCP joint. The flexor pollicis longus tendon shows mild thickening with tenosynovitis of the tendon sheath. There is no effusion in the MCP joint. The extensor tendons are normal.

For comparison, asymptomatic thumb shows normal A1 pulley and flexure tendon.

Case Discussion

An elderly lady presented with thumb locking for the last few months. Ultrasound findings are consistent with the clinical diagnosis of the trigger thumb.

How to use cases

You can use Radiopaedia cases in a variety of ways to help you learn and teach.

Creating your own cases is easy.

Updating… Please wait.

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

 Thank you for updating your details.