Journal
AMERICAN JOURNAL OF SPORTS MEDICINE
Volume 43, Issue 11, Pages 2688-2695Publisher
SAGE PUBLICATIONS INC
DOI: 10.1177/0363546515604622
Keywords
meniscus; anterior cruciate ligament (ACL) reconstruction; nontreatment; in situ
Categories
Funding
- National Institutes of Health/National Institute of Arthritis and Musculoskeletal and Skin Diseases [5R01 AR053684, 5K23 AR052392]
- Vanderbilt Sports Medicine Research Fund
- Biomet
- Stryker
- Smith Nephew
- Mitek
- [UI1TR00445]
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Background: The management of meniscus tears identified at the time of primary anterior cruciate ligament (ACL) reconstruction is highly variable and includes repair, meniscectomy, and nontreatment. Hypothesis/Purpose: The purpose of this study was to determine the reoperation rate for meniscus tears left untreated at the time of ACL reconstruction with a minimum follow-up of 6 years. The hypothesis was that small peripheral tears identified at the time of ACL reconstruction managed with no treatment would have successful clinical outcomes. Study Design: Cohort study; Level of evidence, 3. Methods: Patients with meniscus tears left untreated at the time of primary ACL reconstruction were identified from a multicenter study group with a minimum 6-year follow-up. Patient, tear, and reoperation data were obtained for analysis. The need for reoperation was used as the primary endpoint, with analysis performed to determine patient and tear characteristics associated with reoperation. Results: There were 194 patients with 208 meniscus tears (71 medial, 137 lateral) left in situ without treatment with a complete follow-up for analysis. Of these, 97.8% of lateral and 94.4% of medial untreated tears required no reoperation. Sixteen tears (7.7%) left in situ without treatment underwent subsequent reoperation: 9 tears (4.3%) underwent reoperation in the setting of revision ACL reconstruction, and 7 tears (3.4%) underwent reoperation for an isolated meniscus injury. The patient age was significantly lower in patients requiring reoperation, while tears measuring 10 mm more frequently required reoperation. Conclusion: Lateral and medial meniscus tears left in situ at the time of ACL reconstruction did not require reoperation at a minimum 6-year follow-up for 97.8% and 94.4% of tears, respectively. These findings re-emphasize the low reoperation rate after the nontreatment of small, peripheral lateral meniscus tears while noting less predictable results for medial meniscus tears left without treatment.
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