Anatomical Variants of Lister’s Tubercle. Presentation of an Imaging Classification and Its Clinical Utility
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Abstract
Materials and Methods: Retrospective study using images from MRI database files between 03/01/19 to 11/10/19. We included MRI of the wrist of healthy patients (axial, sagittal, and coronal slices of 1 mm thickness) who were older than 18 years, with no history of previous or current wrist or carpal fracture, excluding those who did not meet these criteria. We analyzed LT, height of the radial and ulnar peaks, the angle, tubercle length, depth of the grooves and septum height. We evaluated the EPL, analyzing the height, thickness, surface, and presence of associated inflammation.
Results: We evaluated 500 MRI of the wrist, obtaining 11 different subtypes of LT. We found 411 type 1 Lister tubercles, 58 type 2, and 26 type 3. Among these, the most frequent were types 1b. 26.6% presentedasymptomatic inflammation in 3rd and 4th compartments.
Conclusion: Lister’s tubercle is of importance in many procedures and serves as an anatomical landmark, meriting to know its most frequent pattern and its anatomical variants. We propose an extension of the classification, adding new types of tubercles to be known and their relationship with the EPL.
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