Clinical features and prognosis of discoid medial meniscus

Chen, Lianxu; Ao, Yingfang; Yu, Jia-Kuo; Yu, Miao; Leung, Kevin; Wang, Haijun; Lin, Lin

doi:10.1007/s00167-012-1979-5

Cited by 20 publications

(35 citation statements)

References 26 publications

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“…In general, the results of meniscectomy for discoid meniscus are good. 4,6,10) Our patient was satisfied with the result of his surgeries and had no complaint.…”

Section: Discussionmentioning

confidence: 61%

“…Once validated, partial resection of torn and symptomatic discoid meniscus with arthroscopy is needed. Chen et al 10) pointed out that the surgical indication of discoid meniscus injury were similar to those of normal meniscus, and nonsurgical treatment was recommended to those without symptoms. Kim and Lubis 4) reported good result of bilateral medial and lateral discoid menisci by partial meniscectomy of both torn medial menisci and preservation of intact lateral meniscus in one side.…”

Section: Discussionmentioning

confidence: 99%

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Bilaterally Simultaneous Medial and Lateral Discoid Menisci

Nam

Kim

Byun

et al. 2015

J Korean Orthop Assoc

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Most discoid menisci are lateral and medial discoid meniscus is very rare. Several articles have reported on bilateral lateral discoid menisci as well as bilateral medial discoid menisci, and a few articles have reported simultaneous medial and lateral discoid menisci in the same knee. Only one case of simultaneous medial and lateral discoid menisci, bilaterally, has been reported. We present another case of a male patient with bilaterally simultaneous medial and lateral discoid menisci, diagnosed with magnetic resonance imaging and arthroscopy. The patient was treated by arthroscopic partial meniscetomy.Key words: meniscus, bilateral discoid meniscus, meniscectomy, magnetic resonance image CASE REPORTA 22-year-old male patient complained of pain and swelling on his left knee for three months with no precipitating traumatic event.From the medical history, he had undergone arthroscopic partial meniscectomy of contralateral knee at the age of 15-year-old in our hospital. He was diagnosed as having a complete medial discoid meniscus with horizontal tear and intact incomplete lateral discoid meniscus ( Fig. 1, 2). The patient was treated by arthroscopic partial meniscectomy for both medial and lateral menisci. And he had no complaint about the right knee.On physical examination, the patient had medial joint line tenderness and had pain on medial side in McMurray's test. A mild degree of effusion was found. Full range of motion was possible without any mechanical symptoms. No abnormalities were detected with simple radiographs. MRI of left knee showed both discoid medial and lateral menisci. Medial meniscus had horizontal tear and lateral meniscus had no tear (Fig. 3).At Arthroscopy, a complete discoid medial meniscus with horizontal tear in the body and intact complete discoid lateral meniscus were found (Fig. 4). Lateral discoid meniscus didn't have hypermobility or impingement. Partial meniscectomy of medial meniscus was performed. At the follow-up one year for left knee and seven years for right knee postoperatively, the patient was asymptomatic in left knee and also in right knee. Preoperative Lysholm score of left knee was 68 but right knee had no record. At the last followup, Lysholm score of left knee was 97 and right knee was 94. The radiologic findings had no definite interval changes including alignment of lower limb and gaps of both medial and lateral joint space. DISCUSSIONThe incidence of discoid lateral menisci ranges from 1.5% to 15.5% and the highest incidence rate of discoid medial menisci reported is 0.3%. 5) Jeannopoulos 3) reported the first case of simultaneous medial and lateral discoid meniscus in the same knee in

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“…In general, the results of meniscectomy for discoid meniscus are good. 4,6,10) Our patient was satisfied with the result of his surgeries and had no complaint.…”

Section: Discussionmentioning

confidence: 61%

Section: Discussionmentioning

confidence: 99%

Bilaterally Simultaneous Medial and Lateral Discoid Menisci

Nam

Kim

Byun

et al. 2015

J Korean Orthop Assoc

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“…Patients suffering from bilateral DLM accounts for 79%-97% of cases [33]. Symptomatic DLM, characterized by pain, swelling, snapping, locking, knee instability and limited mobility [12,27], is mainly diagnosed by magnetic resonance imaging (MRI) and treated by arthroscopic surgery [31]. Although the overall postoperative clinical outcomes of symptomatic DLM are acceptable [11,17,38], the outcomes still differ among individuals, possibly as a result of the diversity in patient characteristics and treatments [31].…”

Section: Introductionmentioning

confidence: 99%

Influential factors of postoperative outcomes of symptomatic lateral discoid meniscus

Yang

Ding

et al. 2020

Preprint

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Background: Due to its abnormal morphology and ultrastructure, discoid lateral meniscus (DLM) is prone to tear and degeneration, leading to clinical symptoms. Arthroscopy is the main treatment for symptomatic DLM; however, postoperative outcomes vary widely due to the effects of diverse factors. This research aims to explore the factors influencing postoperative outcomes of symptomatic DLM. Methods: Patients with DLM who underwent arthroscopic surgery at our hospital from 9/2008 to 9/2015 were enrolled according to the inclusion and exclusion criteria. Fourteen variables, including sex, body mass index (BMI) and other variables, were chosen as factors for study. Knee function was assessed using the International Knee Documentation Committee (IKDC) score. Univariate analyses (Mann-Whitney U test or Kruskall-Wallis rank sum test) and multivariate analyses (ordinal logistic regression) were used to identify the factors that influenced postoperative outcomes. P<0.05 was considered statistically significant.Results: A total of 502 patients, including 353 females (70.3%) and 149 males (29.7%), were enrolled. The median IKDC score postoperatively (87.4; range, 41.4~97.7; IQR, 14.6) was higher than that preoperatively (57.6; range, 26.9~ 64.9; IQR, 9.7) (P<0.001). Male sex was predictive of a higher IKDC score (P=0.023, OR=1.702). Compared with BMI ≥25 kg/m2, <18.5 kg/m2 was associated with better IKDC score (P=0.026, OR=3.016). Contrasting with age of onset ≥45 years, ≤14 years (P<0.001, OR=20.780) and 14~25 years (P<0.001, OR=8.516) were associated with better IKDC score. In comparison with symptoms duration>24 months, IKDC scores for patients with symptoms duration ≤1 month (P=0.001, OR=3.511), 1 ~ 6 months (P < 0.001, OR = 3.463) and 6 ~ 24 months (P < 0.001, OR = 3.254) were significantly elevated. Compared to Outerbridge grade III ~ IV, no injury (P<0.001, OR=6.379) and grade I (P=0.01, OR=4.332) were associated with higher IKDC score.Conclusions: Arthroscopic treatment of symptomatic DLM is safe and effective, but its clinical efficacy is affected by many factors. Specifically, male sex, BMI < 18.5kg/m2, age of onset < 25 years (especially < 14 years) and symptoms duration < 24 months are conducive to good postoperative outcomes. However, combined articular cartilage injury (Outbridge grade≥2) reduces postoperative effect.

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“…A discoid meniscus is a thickened disk-like morphologic variant of a normal meniscus [ 3 ]. Discoid menisci can be partial or complete depending on the amount of tibial plateau they cover.…”

Section: Introductionmentioning

confidence: 99%

“…Of the 13 cases by Chen et al, 7 were complete discoid menisci and 6 were partial discoid menisci. Wrisberg type discoid medial meniscus has not been reported [ 3 ]. Occurrences of discoid medial meniscus are much less than those of discoid lateral menisci.…”

Section: Introductionmentioning

confidence: 99%

Familial Discoid Medial Meniscus Tear in Three Members of a Family: A Case Report and Review of Literature

Ali

McKay

2014

Case Reports in Orthopedics

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Background. A discoid meniscus is a thickened variant of the normal C-shaped meniscus prone to injury. Discoid medial meniscal tears have rarely been reported within families and may suggest familial or developmental origins. Methods. We report the cases of two Caucasian brothers with symptomatic discoid medial meniscus tears. A literature review was conducted addressing discoid medial meniscus and cases of familial meniscus tears. Case Presentation. Physically active brothers presented with progressively worsening knee pain. MRI revealed medial meniscus tears in both brothers. The family history of medial meniscus tears in their mother and the discoid medial meniscus injuries found on arthroscopy suggested evidence for familial discoid medial meniscus tears. Conclusions. Discoid medial meniscus tears within a family have not been previously reported. Two cases of families with discoid lateral meniscus tears have been reported. Discoid medial meniscus is rare relative to the discoid lateral meniscus and predisposes children to symptomatic tears.

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Clinical features and prognosis of discoid medial meniscus

Abstract: Retrospective case series, Level IV.

Cited by 20 publications

References 26 publications

Bilaterally Simultaneous Medial and Lateral Discoid Menisci

Bilaterally Simultaneous Medial and Lateral Discoid Menisci

Influential factors of postoperative outcomes of symptomatic lateral discoid meniscus

Familial Discoid Medial Meniscus Tear in Three Members of a Family: A Case Report and Review of Literature

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