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28b - Answer: 55-year-old female presents with right ulnar region mass

Pomeranz, Stephen
Stephen J Pomeranz, MD
Chief Medical Officer, ProScan Imaging. Founder, MRI Online
Includes DICOM files

HISTORY: 

This 55-year-old female presents with right ulnar region mass.

(QUIZ ANSWER) IN THIS CASE, THERE IS EVIDENCE OF AN ULNAR ARTERY ANEURYSM: 

False.

Using the diagnostic web viewer, we have provided images that assist in telling our clinical story. Areas of significance are indicated below.

FINDINGS:

No aneurysm or pseudoaneurysm of the ulnar artery is identified. 

A small deep ulnar sided pseudocyst lies immediately palmar to the TFC ulnotriquetral attachment and is 5mm in diameter and could be the source of a palpable mass. 

A similar but slightly more conspicuous ganglion pseudocyst is identified on the radial side with a small tail headed towards the ulnar capsule. 

Scaphomultangular and 1st carpal-metacarpal joint arthrosis with insufficiency of the beak ligament is noted. 

CONCLUSION: 

1. No evidence of ulnar artery aneurysm or pseudoaneurysm. 

2. The hook of the hamate is intact. 

3. Small pseudocysts or ganglion pseudocyst on the ulnar side and small but slightly larger ganglion pseudocyst on the radial side. 

4. Radial-sided scaphomultangular and 1st CMC arthrosis.

LESSON 3, TOPIC 9

Case Challenge: Wrist MRI Cases

Case Challenge

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Content reviewed: September 28, 2021

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