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  • Lateral meniscus tear
  • Medial meniscus tear

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  • 717 Internal derangement of knee
  • 717.0 Old bucket handle tear of medial meniscus
  • 717.1 Derangement of anterior horn of medial meniscus
  • 717.2 Derangement of posterior horn of medial meniscus
  • 717.3 Other and unspecified derangement of medial meniscus
  • 717.4 Derangement of lateral meniscus
  • 717.40 Derangement of lateral meniscus unspecified
  • 717.41 Bucket handle tear of lateral meniscus
  • 717.42 Derangement of anterior horn of lateral meniscus
  • 717.43 Derangement of posterior horn of lateral meniscus
  • 717.49 Other derangement of lateral meniscus
  • 717.5 Derangement of meniscus not elsewhere classified

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  • M23.009 Cystic meniscus, unspecified meniscus, unspecified knee
  • M23.202 Derangement of unspecified lateral meniscus due to old tear or injury, unspecified knee
  • M23.205 Derangement of unspecified medial meniscus due to old tear or injury, unspecified knee
  • M23.219 Derangement of anterior horn of medial meniscus due to old tear or injury, unspecified knee
  • M23.229 Derangement of posterior horn of medial meniscus due to old tear or injury, unspecified knee
  • M23.239 Derangement of other medial meniscus due to old tear or injury, unspecified knee
  • M23.249 Derangement of anterior horn of lateral meniscus due to old tear or injury, unspecified knee
  • M23.259 Derangement of posterior horn of lateral meniscus due to old tear or injury, unspecified knee
  • M23.269 Derangement of other lateral meniscus due to old tear or injury, unspecified knee
  • M23.305 Other meniscus derangements, unspecified medial meniscus, unspecified knee
  • M23.319 Other meniscus derangements, anterior horn of medial meniscus, unspecified knee
  • M23.329 Other meniscus derangements, posterior horn of medial meniscus, unspecified knee
  • M23.339 Other meniscus derangements, other medial meniscus, unspecified knee
  • M23.349 Other meniscus derangements, anterior horn of lateral meniscus, unspecified knee
  • M23.359 Other meniscus derangements, posterior horn of lateral meniscus, unspecified knee
  • M23.369 Other meniscus derangements, other lateral meniscus, unspecified knee

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Description

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  • Tear of the fibrocartilage of the meniscus
  • Tears commonly occur from a twisting of the knee with knee flexion
  • Can develop because of laxity in the knee
  • Complaint of joint locking and inability to straighten the knee

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Essentials of Diagnosis

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  • Frequency
    • No true data on isolated incidence and prevalence of meniscal injury2
  • Mechanism of injury
    • Activities that include cutting, deceleration, and landing from a jump3
  • Classification of tear3
    • Longitudinal tear: vertical tear in the meniscus with a longitudinal direction; usually located in the periphery of the meniscus
      • The longer the tear, the more unstable it is, and the end result is the dislocated central part of the meniscus (bucket-handle tear)
    • Horizontal tear: horizontal cleavage in the meniscal tissue
    • Radial tear: vertical tear starting in the free (central) margin of the meniscal tissue
    • Flap tear: oblique vertical cleavage causing a flap tear (parrot beak); a flap tear can also be caused by a horizontal tear
    • Tear in degenerative meniscus: a tear or multiple tears ...

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