Abstract
Objective
To determine the effect of patient age on the accuracy of primary MRI signs of long head of biceps (LHB) tendon tearing and instability in the shoulder using arthroscopy as a reference standard.
Materials and methods
Subjects with MRI studies and subsequent arthroscopy documenting LHB tendon pathology were identified and organized into three age groups (18–40, 41–60, 61–87). Normal and tendinopathic tendons were labeled grade 0, partial tears grade 1 and full tears grade 2. Two radiologists blinded to arthroscopic data graded MRI studies independently. Prevalence of disease, MRI accuracy for outcomes of interest, and inter-reader agreement were calculated.
Results
Eighty-nine subjects fulfilled inclusion criteria with 36 grade 0, 36 grade 1 and 17 grade 2 tendons found at arthroscopy. MRI sensitivity, regardless of age, ranged between 67–86% for grade 0, 72–94% for grade 1 and 82–94% for grade 2 tendons. Specificity ranged between 83–96% for grade 0, 75–85% for grade 1 and 99–100% for grade 2 tendons. MRI accuracy for detection of each LHB category was calculated for each age group. MRI was found to be least sensitive for grade 0 and 1 LHB tendons in the middle-aged group with sensitivity between 55–85% for grade 0 and 53–88% for grade 1 tendons. Agreement between MRI readers was moderate with an unweighted kappa statistic of 62%.
Conclusion
MRI accuracy was moderate to excellent and agreement between MRI readers was moderate. MRI appears to be less accurate in characterizing lower grades of LHB tendon disease in middle-aged subjects.
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We would like to thank Victoria Cain for her assistance in preparation of the manuscript.
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Borrero, C.G., Costello, J., Bertolet, M. et al. Effect of patient age on accuracy of primary MRI signs of long head of biceps tearing and instability in the shoulder: an MRI-arthroscopy correlation study. Skeletal Radiol 47, 203–214 (2018). https://doi.org/10.1007/s00256-017-2783-6
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DOI: https://doi.org/10.1007/s00256-017-2783-6