Lateral Discoid Meniscus: A Case Report

Journal and index pages often block iframe embedding. This reader keeps the evidence details in Orthonotes and leaves the source page one click away.

Abstract

Introduction: Discoid lateral meniscus is a deformity of the meniscus characterized by hypertrophy of the central portion of the meniscus; the incidence rate ranges from 3% to 5% and reaches 15% in Asian ethnicities. Previous researchers have hypothesized that failure to internalize the central portion of the meniscus during embryonic and fetal development due to genetic mutations may be the cause of this disorder. In a number of studies, the detection and selection of appropriate measures have yielded positive results. Case: We reported a 33-year-old male patient complaining that the left leg feels like locking since 4 months ago, previously the patient complained of a left knee sounding "click" after falling while running fast. Patient was diagnosed with a lateral discoid meniscus of the left knee after undergoing a physical examination, an x-ray examination, and an MRI examination. For a torn lateral discoid meniscus, the patient underwent knee arthroscopy and saucerization. Discussion: Discoid meniscus is an anatomical variation of discus-related injuries. The diagnosis is based on the "bow-tie sign" and can be diagnosed by the MRI. The total arthroscopic approach is used to determine the normal position of the discoid, while the saucerization technique is used to maintain normal position. Studies have shown that the saucerization technique can improve the stability of the discoid, reduce neurovascular damage, and reduce the potential of the chondral structure. The combination of saucerization and arthroscopic techniques can help minimize the risk of discoid meniscus injuries. Conclusion: Cases of discoid meniscus are uncommon, and their etiology remains unknown. In asymptomatic cases, conservative is the treatment of choice, whereas in cases with symptoms, surgery can be performed. Saucerization with arthroscopy is currently the most commonly used procedure in its management.