Zheng ZR, Ma H, Yang F, Yuan L, Wang GD, Zhao XW, Ma LF. Discoid medial meniscus of both knees: A case report . World J Clin Cases 2022; 10(25): 9020-9027 [PMID: 36157663 DOI: 10.12998/wjcc.v10.i25.9020]
Corresponding Author of This Article
Long-Fei Ma, MD, Attending Doctor, Department of Orthopedics, The Affiliated Hospital of Jining Medical University, No. 89 Guhuai Road, Jining 272000, Shandong Province, China. doctormlf@yeah.net
Research Domain of This Article
Orthopedics
Article-Type of This Article
Case Report
Open-Access Policy of This Article
This article is an open-access article which was selected by an in-house editor and fully peer-reviewed by external reviewers. It is distributed in accordance with the Creative Commons Attribution Non Commercial (CC BY-NC 4.0) license, which permits others to distribute, remix, adapt, build upon this work non-commercially, and license their derivative works on different terms, provided the original work is properly cited and the use is non-commercial. See: http://creativecommons.org/licenses/by-nc/4.0/
World J Clin Cases. Sep 6, 2022; 10(25): 9020-9027 Published online Sep 6, 2022. doi: 10.12998/wjcc.v10.i25.9020
Discoid medial meniscus of both knees: A case report
Zhong-Ren Zheng, Hui Ma, Fei Yang, Long Yuan, Guo-Dong Wang, Xiao-Wei Zhao, Long-Fei Ma
Zhong-Ren Zheng, Long Yuan, School of Clinical Medicine, Jining Medical University, Jining 272067, Shandong Province, China
Hui Ma, Guo-Dong Wang, Xiao-Wei Zhao, Long-Fei Ma, Department of Orthopedics, The Affiliated Hospital of Jining Medical University, Jining 272000, Shandong Province, China
Fei Yang, Department of Orthopedics, The People’s Hospital of Bozhou, Bozhou 236800, Anhui Province, China
Author contributions: Zheng ZR collected the data, imaging, and surgical reports and wrote the initial draft of the manuscript and subsequent revisions; Ma H and Yuan L were the primary physicians during the patient’s hospital stay; Zhao XW, Wang GD, and Yang F were involved in editing and overseeing the text; Ma LF is the senior author who was the treating surgeon and was responsible for overseeing the report and editing the manuscript; All authors read and approved the final manuscript.
Supported bythe National Natural Science Foundation of China, No. 81871814; and Jining City Key Research and Development Plan, No. 2021YXNS076.
Informed consent statement: The patient provided informed consent as evidenced by her signature.
Conflict-of-interest statement: The authors declare that they have no conflicts of interest.
CARE Checklist (2016) statement: The authors have read the CARE Checklist (2016), and the manuscript was prepared and revised following the CARE Checklist (2016).
Open-Access: This article is an open-access article that was selected by an in-house editor and fully peer-reviewed by external reviewers. It is distributed in accordance with the Creative Commons Attribution NonCommercial (CC BY-NC 4.0) license, which permits others to distribute, remix, adapt, build upon this work non-commercially, and license their derivative works on different terms, provided the original work is properly cited and the use is non-commercial. See: https://creativecommons.org/Licenses/by-nc/4.0/
Corresponding author: Long-Fei Ma, MD, Attending Doctor, Department of Orthopedics, The Affiliated Hospital of Jining Medical University, No. 89 Guhuai Road, Jining 272000, Shandong Province, China. doctormlf@yeah.net
Received: March 20, 2022 Peer-review started: March 20, 2022 First decision: June 16, 2022 Revised: June 29, 2022 Accepted: July 27, 2022 Article in press: July 27, 2022 Published online: September 6, 2022 Processing time: 158 Days and 23 Hours
Abstract
BACKGROUND
Discoid meniscus is a congenital anomaly that typically affects the lateral meniscus. The appearance of the discoid medial meniscus in both knees is extremely rare, with an incidence of only 0.012%.
CASE SUMMARY
Our patient was a 30-year-old female. Under no obvious predisposing causes, she began to experience pain in both knees, which worsened while walking and squatting. The pain was aggravated after exercise, and joint flexion and extension activities were accompanied by knee snapping. Apley’s test was positive on physical examination, and there was a pressing pain in the medial articular space. Plain radiographs of both knees revealed no obvious abnormalities in the bilateral knee joint space. Partial meniscectomy as well as menisci reformation were performed on both knees under arthroscopy. Under the guidance of rehabilitation, the patient’s range of motion in both knees returned to normal without pain and knee snapping.
CONCLUSION
This study showed that the clinical manifestations of the discoid medial meniscus injury are identical to those of the conventional medial meniscus injury, and arthroscopic surgery is effective.
Core Tip: Discoid medial meniscus is very rare, and the bilateral discoid medial meniscus is extremely rare. We present the case of a 30-year-old female with features of a meniscal tear in two symptomatic knees and radiographic findings of discoid menisci in both knees. A provisional diagnosis of bilateral discoid medial menisci was made. Magnetic resonance imaging confirmed the discoid nature of the medial menisci in both knees. Both knees underwent partial meniscectomy and menisci reformation by arthroscopy. After 6 mo of follow-up, the patient had good clinical and functional outcomes.
