Assessing the Accuracy of Rotator Cuff Muscular Fat Infiltration Status in Predicting Symptomatic Retear After Repair...

Area of Science:

• Orthopedic Surgery
• Musculoskeletal Imaging
• Biostatistics

Background:

• Rotator cuff repair is a common orthopedic procedure.
• Retears after rotator cuff repair represent a significant complication, impacting patient outcomes.
• Accurate prediction of retear risk is crucial for patient management and surgical planning.

Purpose of the Study:

• To evaluate the predictive accuracy of the Global Fatty Degeneration Index (GFDI) for retear risk after rotator cuff repair.
• To determine the reliability of GFDI as a quantitative measure for assessing retear likelihood.

Main Methods:

• A single-cohort longitudinal study analyzed historical data from patients undergoing primary rotator cuff repair (2014-2018).
• Preoperative rotator cuff fatty infiltration was quantified using the Global Fatty Degeneration Index (GFDI) from MRI.
• Patient demographics, comorbidities, and retear status were assessed.

Main Results:

• Of 334 patients, 12.6% experienced retears. Diabetes mellitus was more prevalent in the retear group.
• The mean GFDI was significantly higher in patients with retears (2.3 vs. 1.3, P < 0.001).
• GFDI demonstrated strong predictive capability (AUC = 0.866); a GFDI of ≥1.875 predicted retear with 77.6% sensitivity and 89.4% specificity.

Conclusions:

• The Global Fatty Degeneration Index is a reliable quantitative predictor of retear after rotator cuff repair.
• GFDI has significant clinical relevance for preoperative risk assessment in patients undergoing rotator cuff repair.
• Higher GFDI values are strongly associated with increased odds of retear, particularly involving the subscapularis and infraspinatus tendons.