Non-treatment of stable ramp lesions does not degrade clinical outcomes in the setting of primary ACL reconstruction
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Non‑treatment of stable ramp lesions does not degrade clinical outcomes in the setting of primary ACL reconstruction George C. Balazs1 · Harry G. Greditzer IV2 · Dean Wang3 · Niv Marom1 · Hollis G. Potter2 · Scott A. Rodeo1 · Robert G. Marx1 · Riley J. Williams III1 Received: 29 February 2020 / Accepted: 17 April 2020 © European Society of Sports Traumatology, Knee Surgery, Arthroscopy (ESSKA) 2020
Abstract Purpose The purpose of this study was to evaluate the clinical outcomes of various methods of treatment of stable and unstable ramp lesions compared to patients with no meniscal pathology at the time of primary ACL reconstruction. Methods All patients with a preoperative MRI performed at our facility who were enrolled in an institutional ACL registry and 1-year clinical follow-up were identified. A musculoskeletal radiologist reviewed preoperative MRI scans for evidence of a ramp lesion. Ramp lesions were classified as stable if a peripheral tear of the posterior horn of the medial meniscus was identified by MRI, but did not displace into the medial compartment with anteriorly directed probing at the time of surgery. Ramp lesions were classified as unstable if a tear was identified by preoperative MRI at the meniscocapsular junction and the meniscus was displaceable into the medial compartment with probing. Reoperation rates for ACL graft failure or recurrent medial meniscus pathology were collected. Patient-reported outcome scores (IKDC, SF12 PCS, SF12 MCS, and Marx Activity scale) were recorded at baseline and final follow-up. Results A total of 162 patients were included in the analysis with median 2-year (range 1–5 years) clinical follow-up. Patients with a repaired unstable ramp lesion had a significantly higher likelihood of reoperation for recurrent medial meniscus pathology than patients without meniscal pathology at the time of index surgery. Patients with an untreated stable ramp lesion had a similar rate of reoperation when compared to patients without meniscal pathology. At final follow-up, there was no difference between groups in IKDC score, SF12 PCS/MCS, or Marx activity score or change in any score. Conclusions Patients with untreated stable ramp lesions have similar clinical outcomes at median 2-year (range 1–5 years) follow-up when compared to patients without a ramp lesion. Treatment of stable ramp lesions at the time of ACL reconstruction does not have clinical benefit. Level of evidence III. Keywords ACL · Meniscus · Knee · Ramp lesion
Introduction
Investigation performed at Hospital for Special Surgery, New York, NY. * George C. Balazs [email protected] 1
Sports Medicine and Shoulder Service, Hospital for Special Surgery, New York, NY, USA
2
Department of Radiology, Hospital for Special Surgery, New York, USA
3
Department of Orthopaedic Surgery, University of California, Irvine, USA
Ramp lesions of the medial meniscus have received increasing attention in the orthopaedic literature [8, 10, 13, 24]. Occurring in the far periphery of the posterior horn of the med
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