MRI findings correlate with difficult dissection during proximal hamstring repair and with postoperative sciatica.

Area of Science:

• Orthopedic Surgery
• Radiology
• Sports Medicine

Background:

• Proximal hamstring repair can be challenging, sometimes leading to postoperative sciatica.
• Magnetic Resonance Imaging (MRI) is a key tool for evaluating soft tissue injuries.

Purpose of the Study:

• To investigate the correlation between preoperative and postoperative MRI findings and the difficulty of proximal hamstring repair surgery.
• To determine if MRI findings predict the occurrence of postoperative sciatica.

Main Methods:

• Retrospective analysis of 32 proximal hamstring repair cases with preoperative and postoperative MRIs.
• Two blinded musculoskeletal radiologists assessed MRIs for features related to surgical difficulty and sciatica.
• Statistical analysis, including odds ratios (OR), was used to correlate MRI findings with clinical outcomes.

Main Results:

• Preoperative MRI findings like diffuse hamstring edema (suggestive of denervation) and increased sciatic nerve perineural scar correlated with difficult dissection and sciatica.
• Preoperative indicators of difficult dissection included greater tear size and increased nerve signal.
• Postoperative MRI showed that hamstring denervation, nerve tethering, and perineural scar extent were associated with sciatica.

Conclusions:

• Preoperative hamstring MRI can predict difficult sciatic nerve dissection, aiding surgical planning.
• Detailed MRI evaluation of the sciatic nerve and perineural scar is crucial for preoperative assessment.
• Both preoperative and postoperative MRI findings correlate with the development of postoperative sciatica.