Type II lunate with hamatolunate impingement

Case contributed by Dr Matt A. Morgan

Presentation

Ulnar-sided wrist pain

Patient Data

Age: 45-50Y
Gender: Male
MRI

Type II lunate

There is a small facet between the lunate and the tip of the hamate, with abnormally decreased T1 and increased T2 signal in the proximal hamate.

Case Discussion

Approximately half of all wrists have the "type II" lunate configuration, with an extra facet between the lunate and the hamate.

This configuration may lead to altered wrist mechanics, accelerated cartilage loss at the facet, and the eventual development of impingement and pain.  A type II lunate is in the differential of ulnar sided wrist pain and MRI can nicely show bone marrow edema from impingement.

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Case information

rID: 31833
Case created: 31st Oct 2014
Last edited: 10th Sep 2015
Tags: msk, wrist
Inclusion in quiz mode: Included

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