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Radiologic evaluation of the ulnar styloid
Hiromi Yanagida1, Shoji Ishii, Walter H Short
1Department of Orthopedic Surgery, Institute for Human Performance, SUNY Upstate Medical University, 750 East Adams St., Syracuse, NY 13210, USA.
The Journal of Hand Surgery
|January 26, 2002
Summary
Ulnar styloid (US) shape influences abutment syndrome risk. Specific radiographic views, with the shoulder abducted 45 degrees, best detect ulnar styloid fractures and evaluate the fovea.
Area of Science:
- Orthopedic surgery
- Radiology
- Anatomy
Background:
- Ulnar styloid (US) fractures are common wrist injuries.
- Ulnar styloid abutment syndrome is a potential complication.
- Understanding US morphology is crucial for diagnosis and treatment.
Purpose of the Study:
- To investigate the relationship between ulnar styloid (US) shape and US abutment syndrome.
- To identify the optimal radiographic view for detecting US fractures and evaluating the fovea.
Main Methods:
- Radiological examination and direct dissection of 13 cadaver wrists.
- Analysis of radiographs taken at varying shoulder abduction angles.
Main Results:
- A higher incidence of US abutment syndrome was observed in the radially deviated US type.
- The base of the US and ulnar head are not round.
- Specific radiographic positioning (45° shoulder abduction, 90° elbow flexion, neutral forearm rotation) optimizes visualization of the fovea and US.
Conclusions:
- Ulnar styloid (US) morphology is associated with abutment syndrome.
- Optimal radiographic techniques are essential for accurate diagnosis of US fractures and related pathologies.