In regard to shape, the morphology of the normal labrum demonstrates considerable variability on standard MR images.
The cross-sectional shape of the labrum is triangular in most cases (anterior, 64%; posterior, 47%), followed by rounded (anterior, 17%; posterior, 33%).
However, in a minority of cases the normal labral shape can be blunted, cleaved, notched, or even flat.
The anterior and inferior portions of the labrum are smaller than their posterior and superior counterparts, respectively
There is higher variability in the shape of the anterior labrum versus the posterior labrum
The cleaved or notching labrum may be mistaken for a labral tear.
This notched appearance can also result from the close apposition of the middle and inferior glenohumeral ligaments with the anterior labrum.
The labrum may also give a false appearance of notching if one mistakes a closely apposed glenohumeral ligament for part of the labral substance
© 2021 MSK MRI Jee Eun Lee All Rights Reserved.
You may not distribute or commercially exploit the content. Nor may you transmit it or store it on any other website or other forms of the electronic retrieval system.
If you would like to use an image or video for anything other than personal use, please contact me.
(jamaisvu1977@gmail.com)
#MSKMRI, #virtualMRI, #radiologist, #Shoulder_MRI, #MSKMRI_Shoulder, #Shoulder_anatomy, #Shoulder_labrum, #glenoidlabrum, #Virtual_MRI, #MRI_illustrator, #glenoid_labrum, #labrum_variant, #SLAPlesion, #shoulderinstability,
