Large, congenitally dysplastic meniscus with loss of normal semilunar shape
IMAGING
General Features
Radiographic Findings
MR Findings
Ultrasonographic Findings
Imaging Recommendations
DIFFERENTIAL DIAGNOSIS
PATHOLOGY
General Features
Staging, Grading, & Classification
Gross Pathologic & Surgical Features
CLINICAL ISSUES
Presentation
Demographics
Natural History & Prognosis
Treatment
DIAGNOSTIC CHECKLIST
Consider
Image Interpretation Pearls
Selected References
Nishino K et al: Magnetic resonance imaging T2 relaxation times of articular cartilage before and after arthroscopic surgery for discoid lateral meniscus. Arthroscopy. 37(2):647-54, 2021
Tyler PA et al: Update on imaging of the discoid meniscus. Skeletal Radiol. ePub, 2021
Yang SJ et al: A reliable, ultrasound-based method for the diagnosis of discoid lateral meniscus. Arthroscopy. 37(3):882-90, 2021
Ha CW et al: Predictive validity of radiographic signs of complete discoid lateral meniscus in children using machine learning techniques. J Orthop Res. 38(6):1279-88, 2019
Restrepo R et al: Discoid meniscus in the pediatric population: emphasis on MR imaging signs of instability. Magn Reson Imaging Clin N Am. 27(2):323-39, 2019
Park YB et al: Prediction models to improve the diagnostic value of plain radiographs in children with complete discoid lateral meniscus. Arthroscopy. 34(2):479-489.e3, 2018
Ha CW et al: The utility of the radiographic condylar cut-off sign in children and adolescents with complete discoid lateral meniscus. Knee Surg Sports Traumatol Arthrosc. 25(12):3862-8, 2017
Choi SH et al: Do the radiographic findings of symptomatic discoid lateral meniscus in children differ from normal control subjects? Knee Surg Sports Traumatol Arthrosc. 23(4):1128-34, 2015
Kushare I et al: Discoid meniscus: diagnosis and management. Orthop Clin North Am. 46(4):533-40, 2015
Song JG et al: Radiographic evaluation of complete and incomplete discoid lateral meniscus. Knee. 22(3):163-8, 2015
Stein MI et al: Regeneration of a discoid meniscus after arthroscopic saucerization. Am J Orthop (Belle Mead NJ). 42(1):E5-8, 2013
Yoo WJ et al: Meniscal morphologic changes on magnetic resonance imaging are associated with symptomatic discoid lateral meniscal tear in children. Arthroscopy. 28(3):330-6, 2012
Ozcanli H et al: Relation of discoid lateral meniscus and cord-like anterior intermeniscal ligament: morphological and clinical study. Surg Radiol Anat. 33(8):673-8, 2011
Wasser L et al: Arthroscopic treatment of discoid meniscus in children: Clinical and MRI results. Orthop Traumatol Surg Res. 97(3):297-303, 2011
Ha CW et al: The condylar cutoff sign: quantifying lateral femoral condylar hypoplasia in a complete discoid meniscus. Clin Orthop Relat Res. 467(5):1365-9, 2009
Kramer DE et al: Meniscal tears and discoid meniscus in children: diagnosis and treatment. J Am Acad Orthop Surg. 17(11):698-707, 2009
Ahn JH et al: Arthroscopic partial meniscectomy with repair of the peripheral tear for symptomatic discoid lateral meniscus in children: results of minimum 2 years of follow-up. Arthroscopy. 24(8):888-98, 2008
Yaniv M et al: The discoid meniscus. J Child Orthop. 1(2):89-96, 2007
Singh K et al: MRI appearance of Wrisberg variant of discoid lateral meniscus. AJR Am J Roentgenol. 187(2):384-7, 2006
Klingele KE et al: Discoid lateral meniscus: prevalence of peripheral rim instability. J Pediatr Orthop. 24(1):79-82, 2004
Youm T et al: Discoid lateral meniscus: evaluation and treatment. Am J Orthop. 33(5):234-8, 2004
Samoto N et al: Diagnosis of discoid lateral meniscus of the knee on MR imaging. Magn Reson Imaging. 20(1):59-64, 2002
Ahn JH et al: Discoid lateral meniscus in children: clinical manifestations and morphology. J Pediatr Orthop. 21(6):812-6, 2001
Rohren EM et al: Discoid lateral meniscus and the frequency of meniscal tears. Skeletal Radiol. 30(6):316-20, 2001
Connolly B et al: Discoid meniscus in children: magnetic resonance imaging characteristics. Can Assoc Radiol J. 47(5):347-54, 1996
Auge WK 2nd et al: Bilateral discoid medial menisci with extensive intrasubstance cleavage tears: MRI and arthroscopic correlation. Arthroscopy. 10(3):313-8, 1994
Silverman JM et al: Discoid menisci of the knee: MR imaging appearance. Radiology. 173(2):351-4, 1989
Related Anatomy
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Related Differential Diagnoses
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References
Tables
Tables
KEY FACTS
Imaging
Pathology
Clinical Issues
TERMINOLOGY
Definitions
Large, congenitally dysplastic meniscus with loss of normal semilunar shape
IMAGING
General Features
Radiographic Findings
MR Findings
Ultrasonographic Findings
Imaging Recommendations
DIFFERENTIAL DIAGNOSIS
PATHOLOGY
General Features
Staging, Grading, & Classification
Gross Pathologic & Surgical Features
CLINICAL ISSUES
Presentation
Demographics
Natural History & Prognosis
Treatment
DIAGNOSTIC CHECKLIST
Consider
Image Interpretation Pearls
Selected References
Nishino K et al: Magnetic resonance imaging T2 relaxation times of articular cartilage before and after arthroscopic surgery for discoid lateral meniscus. Arthroscopy. 37(2):647-54, 2021
Tyler PA et al: Update on imaging of the discoid meniscus. Skeletal Radiol. ePub, 2021
Yang SJ et al: A reliable, ultrasound-based method for the diagnosis of discoid lateral meniscus. Arthroscopy. 37(3):882-90, 2021
Ha CW et al: Predictive validity of radiographic signs of complete discoid lateral meniscus in children using machine learning techniques. J Orthop Res. 38(6):1279-88, 2019
Restrepo R et al: Discoid meniscus in the pediatric population: emphasis on MR imaging signs of instability. Magn Reson Imaging Clin N Am. 27(2):323-39, 2019
Park YB et al: Prediction models to improve the diagnostic value of plain radiographs in children with complete discoid lateral meniscus. Arthroscopy. 34(2):479-489.e3, 2018
Ha CW et al: The utility of the radiographic condylar cut-off sign in children and adolescents with complete discoid lateral meniscus. Knee Surg Sports Traumatol Arthrosc. 25(12):3862-8, 2017
Choi SH et al: Do the radiographic findings of symptomatic discoid lateral meniscus in children differ from normal control subjects? Knee Surg Sports Traumatol Arthrosc. 23(4):1128-34, 2015
Kushare I et al: Discoid meniscus: diagnosis and management. Orthop Clin North Am. 46(4):533-40, 2015
Song JG et al: Radiographic evaluation of complete and incomplete discoid lateral meniscus. Knee. 22(3):163-8, 2015
Stein MI et al: Regeneration of a discoid meniscus after arthroscopic saucerization. Am J Orthop (Belle Mead NJ). 42(1):E5-8, 2013
Yoo WJ et al: Meniscal morphologic changes on magnetic resonance imaging are associated with symptomatic discoid lateral meniscal tear in children. Arthroscopy. 28(3):330-6, 2012
Ozcanli H et al: Relation of discoid lateral meniscus and cord-like anterior intermeniscal ligament: morphological and clinical study. Surg Radiol Anat. 33(8):673-8, 2011
Wasser L et al: Arthroscopic treatment of discoid meniscus in children: Clinical and MRI results. Orthop Traumatol Surg Res. 97(3):297-303, 2011
Ha CW et al: The condylar cutoff sign: quantifying lateral femoral condylar hypoplasia in a complete discoid meniscus. Clin Orthop Relat Res. 467(5):1365-9, 2009
Kramer DE et al: Meniscal tears and discoid meniscus in children: diagnosis and treatment. J Am Acad Orthop Surg. 17(11):698-707, 2009
Ahn JH et al: Arthroscopic partial meniscectomy with repair of the peripheral tear for symptomatic discoid lateral meniscus in children: results of minimum 2 years of follow-up. Arthroscopy. 24(8):888-98, 2008
Yaniv M et al: The discoid meniscus. J Child Orthop. 1(2):89-96, 2007
Singh K et al: MRI appearance of Wrisberg variant of discoid lateral meniscus. AJR Am J Roentgenol. 187(2):384-7, 2006
Klingele KE et al: Discoid lateral meniscus: prevalence of peripheral rim instability. J Pediatr Orthop. 24(1):79-82, 2004
Youm T et al: Discoid lateral meniscus: evaluation and treatment. Am J Orthop. 33(5):234-8, 2004
Samoto N et al: Diagnosis of discoid lateral meniscus of the knee on MR imaging. Magn Reson Imaging. 20(1):59-64, 2002
Ahn JH et al: Discoid lateral meniscus in children: clinical manifestations and morphology. J Pediatr Orthop. 21(6):812-6, 2001
Rohren EM et al: Discoid lateral meniscus and the frequency of meniscal tears. Skeletal Radiol. 30(6):316-20, 2001
Connolly B et al: Discoid meniscus in children: magnetic resonance imaging characteristics. Can Assoc Radiol J. 47(5):347-54, 1996
Auge WK 2nd et al: Bilateral discoid medial menisci with extensive intrasubstance cleavage tears: MRI and arthroscopic correlation. Arthroscopy. 10(3):313-8, 1994
Silverman JM et al: Discoid menisci of the knee: MR imaging appearance. Radiology. 173(2):351-4, 1989
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