Summary: Arthroscopic meniscectomy or repair, with cyst decompression, was effective in treating horizontal cleavage meniscal tears with meniscal cysts.

Background

Meniscal cysts are related to horizontal cleavage tears of the adjacent meniscus. Numerous treatments about meniscal cysts combined with meniscal tears have been reported.

Purpose

The purpose of this study was to investigate the location and size of meniscal cysts in patients who had arthroscopic surgery of horizontal cleavage meniscal tears and to analyze the clinical outcomes of arthroscopic treatment.

Methods

A total of 73 meniscal cysts in 65 knees treated with arthroscopic surgery from June 2011 to August 2021 were examined. The knees which had meniscal cysts with meniscal tears in preoperative Magnetic Resonance Imaging (MRI) and underwent arthroscopic surgery (meniscectomy, repair) with cyst decompression were included. The size, location, and tear patterns of meniscal cysts at preoperative MRI and arthroscopy were analyzed. Patients had a minimum of 1-year clinical follow-up. Tegner score, Lysholm knee score, and Hospital for Special Surgery (HSS) score were applied to evaluate the clinical outcomes.

Results

Meniscal cysts were found approximately at a 1:1 medial meniscus (MM) to lateral meniscus (LM) ratio. For the group of meniscal cysts in the MM, 78.9% (30/38) of meniscal cysts were located at the area around the posterior horn of the MM. 91.4% (32/35) of the meniscal cysts at the LM were found around the anterior horn or the midbody of the LM. The Tegner score (from 2.75 ± 1.03 to 4.09 ± 1.38), Lysholm knee score (from 69.14 ± 14.46 to 88.69 ± 7.97), and HSS score (from 81.57 ± 9.47 to 95.45 ± 4.73) were all significantly increased after arthroscopic surgery with cyst decompression. The clinical outcomes of the patients who underwent arthroscopic meniscectomy and arthroscopic repair showed no significant statistical difference. After cyst decompression arthroscopic surgery, 80.0% of all meniscal cysts (32/40) were completely removed on postoperative MRI. 87.5% (7/8) of incompletely removed cysts were larger than 20mm on preoperative MRI. There was no significant difference in the laterality between large cysts (>20mm) and cysts (<20mm). Two cases lead to additional re-operations.

Conclusion

Arthroscopic meniscectomy or repair, with cyst decompression, was effective in treating horizontal cleavage meniscal tears with meniscal cysts. No significant clinical difference was found between the results of the two arthroscopic surgeries. In addition, the size of the cyst measured on preoperative MRI had a significant effect on the complete removal status.

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New Conservative Treatment Option for Symptomatic Degenerative Medial Meniscus Tear -Ultrasound-Guided Injection of MCL Bursa- ePoster Presentation Junsuke Nakase, MD, PhD, JAPAN Rikuto Yoshimizu, JAPAN Tomoyuki Kanayama, MD, JAPAN Yusuke Yanatori, MD, JAPAN Hiroyuki Tsuchiya, JAPAN
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Lateral Meniscus Root Tear in ACL-Injured Patients Results In High-Grade Rotatory Knee Laxity: A Quantitative Pivot Shift Analysis ePoster Presentation Bálint Zsidai, MD, SWEDEN Gian Andrea Lucidi, MD, ITALY Ryosuke Kuroda, MD, PhD, JAPAN James J. Irrgang, PT, PhD, FAPTA, UNITED STATES Kristian Samuelsson, Prof, MD, PhD, MSc, SWEDEN Stefano Zaffagnini, MD, Prof., ITALY Volker Musahl, MD, Prof., UNITED STATES
Accuracy of Magnetic Resonance Imaging for Detecting Meniscal Tears in Anterior Cruciate Ligament injuries. ePoster Presentation Artit Boonrod, MD, THAILAND Watcharapong Wongsawiang , MD, THAILAND Punthip Thammaroj , MD, THAILAND Sermsak Sumanont, THAILAND Punyawat Apiwatanakul, MD, THAILAND Arunnit Boonrod, MD, THAILAND
Etiology of Posterior Meniscus Root Tears: Medial vs. Lateral ePoster Presentation Katrin Karpinski, MD, GERMANY Philipp Forkel, MD, GERMANY Martin Häner, MD, GERMANY Wolf Petersen, MD, Prof, GERMANY
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Medial Meniscus Repair only Partially Restores In-Vivo Knee Kinematics after ACL Reconstruction ePoster Presentation Alberto Grassi, PhD, ITALY Piero Agostinone, MD, ITALY Stefano Di Paolo, Eng, ITALY Gian Andrea Lucidi, MD, ITALY Erika Pinelli, MsC, ITALY Gregorio Marchiori, MD, ITALY Marco Bontempi, PhD, ITALY Laura Bragonzoni, Prof., ITALY Stefano Zaffagnini, MD, Prof., ITALY
The High Prevalence of Spin Reporting Bias in Meniscal Allograft Transplant Abstracts: A Qualitative Assessment Of Systematic Reviews and Meta-Analyses ePoster Presentation Matthew T Gulbrandsen, MD, UNITED STATES Mustafa Hashimi, BS, UNITED STATES Taha Taka, BS, UNITED STATES Trevor Gulbrandsen, MD, UNITED STATES Anthony Essilfie, MD, UNITED STATES Anikar Chhabra, MD, MS, UNITED STATES Seth L. Sherman, MD, UNITED STATES
Biomechanical Comparison Of Novel Meniscus Cap Repair Technique With Simple Meniscus Suture And Collagen Matrix Meniscus Suture Techniques For Complex Tears Of The Medial Meniscus ePoster Presentation Kinga Ciemniewska-Gorzela, PhD, POLAND
Biomechanical Effect of Unstable Meniscal Injury on Gait in ACL-Deficient and -Reconstructed Knees ePoster Presentation Kengo Harato, MD, PhD, JAPAN Kohei Nishizawa, PhD, JAPAN Shu Kobayashi, MD, PhD, JAPAN Yasuo Niki, MD, PhD, JAPAN Takeo Nagura, MD, JAPAN
No Dynamic Extrusion of the Medial Meniscus in Ultrasound Examination in Patients with Confirmed Root Tear Lesion ePoster Presentation Katrin Karpinski, MD, GERMANY Theresa Diermeier, MD, GERMANY Lukas Willinger, MD, GERMANY Andreas B. Imhoff, MD, Prof. Emeritus, GERMANY Andrea E. Achtnich, Assoc. Prof., GERMANY Wolf Petersen, MD, Prof, GERMANY

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Arthroscopic Treatment of Meniscal Cysts and Clinical Follow Up

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Arthroscopic Treatment of Meniscal Cysts and Clinical Follow Up

Arthroscopic Treatment of Meniscal Cysts and Clinical Follow Up

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