Medición de la pérdida ósea glenoidea y defecto de Hill-Sachs por resonancia magnética: estudio de correlación y concordancia con la medición por tomografía computarizada

Abstract

Introduction

The aim is to define whether the measurement of glenoid and Hill–Sachs defects by magnetic resonance imaging is equivalent to the measurement by simple tomography in patients with anterior shoulder instability.

Materials and methods

Descriptive, observational, cross-sectional study of a cohort of imaging studies of patients with a history of anterior shoulder dislocation, comprising magnetic resonance and simple tomography of the shoulder, performed in a fourth level hospital.

Results

The cohort consisted of 20 cases; a high and statistically significant correlation was found for the measurement of the glenoid diameter and defect, with a p < 0.05 between the MRI and simple tomography. In addition, the Hill–Sachs interval measurement was found to be statistically significant, but the correlation index was not high, 60%. For intraobserver agreement, a Kappa index was calculated for MRI of 0.8 compared to CT with p-value <0.05 significant for engaging and non-engaging defects.

Conclusion

Simple MRI is a reliable imaging method with high correlation index for the measurement of diameter and glenoid defects with good agreement to establish whether Hill–Sachs defects are engaging or not.

Level of Evidence

Level III