Tear of meniscus in which 1 or more meniscus fragments are displaced from their normal location
Bucket-handle and horizontal flap tears discussed in separate chapters
"Parrot beak" term not used by most surgeons, not employed in ISAKOS surgical classification system
IMAGING
General Features
CT Findings
MR Findings
Imaging Recommendations
DIFFERENTIAL DIAGNOSIS
CLINICAL ISSUES
Presentation
Natural History & Prognosis
Treatment
DIAGNOSTIC CHECKLIST
Consider
Image Interpretation Pearls
Selected References
Hoover KB et al: Reliability of meniscus tear description: a study using MRI from the Osteoarthritis Initiative. Rheumatol Int. 40(4):635-41, 2020
KarakoƧ Y et al: The role of magnetic resonance imaging and clinical assessments in predicting meniscal tear surgery. Eklem Hastalik Cerrahisi. 30(2):85-90, 2019
Shakoor D et al: Diagnosis of knee meniscal injuries by using three-dimensional MRI: a systematic review and meta-analysis of diagnostic performance. Radiology. 290(2):435-45, 2019
Boody BS et al: Displaced medial and lateral bucket handle meniscal tears with intact ACL and PCL. Orthopedics. 38(8):e738-41, 2015
Lance V et al: MR imaging characteristics and clinical symptoms related to displaced meniscal flap tears. Skeletal Radiol. 44(3):375-84, 2015
Ahn JH et al: The double flipped meniscus sign: unusual MRI findings in bucket-handle tear of the lateral meniscus. Knee. 21(1):129-32, 2014
Nguyen JC et al: MR imaging-based diagnosis and classification of meniscal tears. Radiographics. 34(4):981-99, 2014
Prasad A et al: MRI imaging of displaced meniscal tears: report of a case highlighting new potential pitfalls of the MRI signs. Indian J Radiol Imaging. 24(3):291-6, 2014
Dunoski B et al: MRI of displaced meniscal fragments. Pediatr Radiol. 42(1):104-12, 2012
Rao N et al: Use of the V-sign in the diagnosis of bucket-handle meniscal tear of the knee. Skeletal Radiol. 41(3):293-7, 2012
Takayama K et al: The double ACL sign: an unusual bucket-handle tear of medial meniscus. Knee Surg Sports Traumatol Arthrosc. 19(8):1343-6, 2011
Eskander MS et al: A lateral meniscus tear incarcerated behind the popliteus tendon: a case report. Knee. 17(5):359-61, 2010
Kakel R et al: The triple PCL sign: bucket handle tears of both medial and lateral menisci in a chronically ACL-deficient knee. Orthopedics. 33(10):772, 2010
McKnight A et al: Meniscal tears with displaced fragments: common patterns on magnetic resonance imaging. Skeletal Radiol. 39(3):279-83, 2010
Marx RG et al: Displacement of the posterior horn of the lateral meniscus into posterolateral compartment: an unusual injury pattern. HSS J. 5(1):9-11, 2009
Venkatanarasimha N et al: Potential pitfalls of a double PCL sign. Skeletal Radiol. 38(8):735-9, 2009
Moraux A et al: Inferiorly displaced flap tear of the medial meniscus: sonographic diagnosis. J Ultrasound Med. 27(12):1795-8, 2008
Boxheimer L et al: Characteristics of displaceable and nondisplaceable meniscal tears at kinematic MR imaging of the knee. Radiology. 238(1):221-31, 2006
Vande Berg BC et al: Meniscal tears with fragments displaced in notch and recesses of knee: MR imaging with arthroscopic comparison. Radiology. 234(3):842-50, 2005
Chen HC et al: MR imaging of displaced meniscal tears of the knee. Importance of a "disproportional posterior horn sign". Acta Radiol. 42(4):417-21, 2001
Lecas LK et al: Inferiorly displaced flap tears of the medial meniscus: MR appearance and clinical significance. AJR Am J Roentgenol. 174(1):161-4, 2000
Wright DH et al: Bucket-handle tears of the medial and lateral menisci of the knee: value of MR imaging in detecting displaced fragments. AJR Am J Roentgenol. 165(3):621-5, 1995
Quinn SF et al: Menisci of the knee: radial MR imaging correlated with arthroscopy in 259 patients. Radiology. 185(2):577-80, 1992
Tear of meniscus in which 1 or more meniscus fragments are displaced from their normal location
Bucket-handle and horizontal flap tears discussed in separate chapters
"Parrot beak" term not used by most surgeons, not employed in ISAKOS surgical classification system
IMAGING
General Features
CT Findings
MR Findings
Imaging Recommendations
DIFFERENTIAL DIAGNOSIS
CLINICAL ISSUES
Presentation
Natural History & Prognosis
Treatment
DIAGNOSTIC CHECKLIST
Consider
Image Interpretation Pearls
Selected References
Hoover KB et al: Reliability of meniscus tear description: a study using MRI from the Osteoarthritis Initiative. Rheumatol Int. 40(4):635-41, 2020
KarakoƧ Y et al: The role of magnetic resonance imaging and clinical assessments in predicting meniscal tear surgery. Eklem Hastalik Cerrahisi. 30(2):85-90, 2019
Shakoor D et al: Diagnosis of knee meniscal injuries by using three-dimensional MRI: a systematic review and meta-analysis of diagnostic performance. Radiology. 290(2):435-45, 2019
Boody BS et al: Displaced medial and lateral bucket handle meniscal tears with intact ACL and PCL. Orthopedics. 38(8):e738-41, 2015
Lance V et al: MR imaging characteristics and clinical symptoms related to displaced meniscal flap tears. Skeletal Radiol. 44(3):375-84, 2015
Ahn JH et al: The double flipped meniscus sign: unusual MRI findings in bucket-handle tear of the lateral meniscus. Knee. 21(1):129-32, 2014
Nguyen JC et al: MR imaging-based diagnosis and classification of meniscal tears. Radiographics. 34(4):981-99, 2014
Prasad A et al: MRI imaging of displaced meniscal tears: report of a case highlighting new potential pitfalls of the MRI signs. Indian J Radiol Imaging. 24(3):291-6, 2014
Dunoski B et al: MRI of displaced meniscal fragments. Pediatr Radiol. 42(1):104-12, 2012
Rao N et al: Use of the V-sign in the diagnosis of bucket-handle meniscal tear of the knee. Skeletal Radiol. 41(3):293-7, 2012
Takayama K et al: The double ACL sign: an unusual bucket-handle tear of medial meniscus. Knee Surg Sports Traumatol Arthrosc. 19(8):1343-6, 2011
Eskander MS et al: A lateral meniscus tear incarcerated behind the popliteus tendon: a case report. Knee. 17(5):359-61, 2010
Kakel R et al: The triple PCL sign: bucket handle tears of both medial and lateral menisci in a chronically ACL-deficient knee. Orthopedics. 33(10):772, 2010
McKnight A et al: Meniscal tears with displaced fragments: common patterns on magnetic resonance imaging. Skeletal Radiol. 39(3):279-83, 2010
Marx RG et al: Displacement of the posterior horn of the lateral meniscus into posterolateral compartment: an unusual injury pattern. HSS J. 5(1):9-11, 2009
Venkatanarasimha N et al: Potential pitfalls of a double PCL sign. Skeletal Radiol. 38(8):735-9, 2009
Moraux A et al: Inferiorly displaced flap tear of the medial meniscus: sonographic diagnosis. J Ultrasound Med. 27(12):1795-8, 2008
Boxheimer L et al: Characteristics of displaceable and nondisplaceable meniscal tears at kinematic MR imaging of the knee. Radiology. 238(1):221-31, 2006
Vande Berg BC et al: Meniscal tears with fragments displaced in notch and recesses of knee: MR imaging with arthroscopic comparison. Radiology. 234(3):842-50, 2005
Chen HC et al: MR imaging of displaced meniscal tears of the knee. Importance of a "disproportional posterior horn sign". Acta Radiol. 42(4):417-21, 2001
Lecas LK et al: Inferiorly displaced flap tears of the medial meniscus: MR appearance and clinical significance. AJR Am J Roentgenol. 174(1):161-4, 2000
Wright DH et al: Bucket-handle tears of the medial and lateral menisci of the knee: value of MR imaging in detecting displaced fragments. AJR Am J Roentgenol. 165(3):621-5, 1995
Quinn SF et al: Menisci of the knee: radial MR imaging correlated with arthroscopy in 259 patients. Radiology. 185(2):577-80, 1992
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