ArticleKnee surgery, sports traumatology, arthroscopy : official journal of the ESSKA2026
Patients with preoperative bone marrow oedema benefit more substantially from medial meniscus posterior root repair.
Article in Knee surgery, sports traumatology, arthroscopy : official journal of the ESSKA, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
purposeTo analyze the clinical outcomes of the surgical repair of medial meniscus posterior root tear (MMRT) in patients with preoperative bone marrow oedema (BME).
methodsPatients who underwent arthroscopic pull-out repair for MMRT between 2010 and 2022 were retrospectively reviewed, and those with a minimum of two years of follow-up were included. The patients were then classified into two groups based on the presence of BME in the medial compartment of the knee on preoperative magnetic resonance imaging (Group 1: patients without BME, Group 2: patients with BME). A comparative analysis was conducted for subjective and objective outcomes, including clinical scores and radiological parameters, at 2 years post-operatively and at the final follow-up. In particular, the minimal clinically important difference (MCID), substantial clinical benefit (SCB), and patient acceptable symptom state (PASS) values for both the International Knee Documentation Committee (IKDC) subjective and Lysholm scores were used to evaluate post-operative clinical improvement compared to preoperative baseline scores.
resultsA total of 95 patients were included (Group 1: 54 patients, mean follow-up 4.1 ± 2.1 years; Group 2: 41 patients, mean follow-up 4.2 ± 2.3 years). There were no significant differences in demographic and preoperative data, radiological parameters, or clinical scores at 2 years post-operatively or at the final follow-up. Similar results were observed consistently across subgroup analyses stratified by BME severity. However, the proportion of patients who achieved PASS, improvement beyond MCID at 2 years post-operatively, and SCB at the final follow-up for IKDC subjective score was significantly higher in Group 2 (p = 0.049, p = 0.047 and p = 0.038, respectively).
conclusionsPreoperative BME in patients undergoing surgical repair for MMRT did not appear to affect short- and mid-term outcomes but was indeed associated with a higher likelihood of functional improvement. Thus, preoperative BME need not be a concern in the surgical repair of MMRT. LEVEL OF EVIDENCE: Level III.
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