Knee Ligament Injury in Athletes. Laura W. Bancroft, M.D.

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1 Knee Ligament Injury in Athletes Laura W. Bancroft, M.D.

2 Objectives To review the imaging appearance of knee ligament injury in athletes: Anterior cruciate ligament (ACL) Posterior cruciate ligament (PCL) Medial collateral ligament (MCL) Lateral collateral ligament (LCL) Patellofemoral ligament Iliotibial band

3 Knee Injuries FORCE Anterior Translation Posterior Translation Varus (medial to lateral) Valgus (lateral to medial) Internal Rotation (femur fixed) External Rotation (femur fixed) Hyperextension RESISTANCE ACL PCL LCL MCL LCL MCL PCL Hayes CW, et al. Mechanism-based pattern approach to classificaiton of complex injuries of the knee depicted at MR imaging. RadioGraphics 2000; 20:S

4 ANTERIOR CRUCIATE LIGAMENT

5 posterolateral posterolateral Normal 2 bands posterolateral and anteromedial

6 anteromedial anteromedial Normal 2 bands posterolateral and anteromedial

7 Mucinous degeneration of ACL + ACL ganglion

8 Mucinous degeneration of ACL + ACL ganglion

9 ACL ganglion

10 Partial tear Posterolateral bundle

11 Torn near femoral origin

12 Midsubstance tear

13 Torn near tibial attachment

14 Chronic ACL tear

15 Buckled PCL

16 Anterior drawer sign

17 *

18 ACL Contusions Posterior lateral tibial plateau 7 sign Lateral femoral condyle (coup) Deep lateral sulcus Medial femoral condyle (contrecoup)

19 ACL tear Coup and contrecoup contusions

20 Coup contusions

21 Contrecoup contusions

22 ACL Adolescents may have same contusion pattern as adults, but may preserve ACL Increased ligamentous laxity

23

24 ACL

25 Tibial avulsion fracture at ACL attachment

26

27

28 ACL Sprain with marrow edema

29 O Donoghue s Triad

30 Segond fracture Cortical avulsion of the tibia at the insertion of the middle 1/3 of the lateral capsular ligament Internal rotation and varus stress High association with: ACL injuries (75-100%) Meniscal tears (66-75%) Posterolateral corner of knee

31

32 Segond fracture

33 Segond fracture + ACL tear

34 Knee Dislocation

35 Knee Dislocation

36 Knee Dislocation

37 ACL torn and fibrosed to PCL

38 Posterior Cruciate Ligament

39 PCL sprain

40 PCL sprain

41 PCL sprain

42 PCL partial tear

43 PCL sprain high grade

44 PCL sprain

45 PCL ganglion

46 PCL rupture

47 PCL rupture

48 PCL rupture

49 Medial Collateral Ligament

50 MCL sprain

51 MCL sprain

52 MCL

53 MCL sprain

54 MCL partial thickness tear

55 MCL distal rupture

56 MCL high grade partial tear and femoral epicondylar spurring

57 MCL grade 2 sprain

58 MCL avulsive marrow changes deep fiber rupture

59 MCL rupture deep fibers and near complete rupture of superficial fibers

60 Schweitzer ME, et al. Medial collateral ligament injuries. Radiology 1995; 194: MCL mid rupture

61 MCL distal rupture

62 Pellegrini-Stieda calcifications

63 Pelligrini-Stieda calcifications

64 uptu MCL bursitis

65 Edema-like signal about the MCL: -MCL sprain -osteoarthrosis -extruded meniscus

66 Lateral Collateral Ligament

67 Fibular collateral ligament sprain

68 Fibular collateral ligament rupture

69 Patellofemoral Ligament

70 Patellofemoral ligament avulsion

71 Patellofemoral ligament avulsion

72 Patellofemoral ligament avulsion

73 Patellofemoral ligament avulsion

74 Patellofemoral ligament avulsion

75 Iliotibial Band

76 Repetitive flexion and extension Friction against lateral femoral condyle Runners Iliotibial Band Friction Syndrome Muhle C, et al. Iliotibial band friction syndrome: MR imaging findings in 16 patients and MR arthrographic study of six cadaveric knees. Radiology 1999; 212: Nishimura G, et al. MR findings in iliotibial band syndrome. Skeletal Radiol 1997; 26:

77 Repetitive flexion and extension Friction against lateral femoral condyle Runners Iliotibial Band Friction Syndrome Muhle C, et al. Iliotibial band friction syndrome: MR imaging findings in 16 patients and MR arthrographic study of six cadaveric knees. Radiology 1999; 212: Nishimura G, et al. MR findings in iliotibial band syndrome. Skeletal Radiol 1997; 26:

78 Iliotibial band friction syndrome

79 Iliotibial band friction syndrome

80 Conclusion The integrity of the anterior cruciate ligament can be assessed by primary and multiple secondary signs, and can be associated with multiple other injuries involving the MCL, menisci and medial tibial rim

81 Conclusion Posterior cruciate ligament sprains are more common than full thickness tears Medial collateral ligament tears are associated with valgus forces and can be part of O Donoghue s triad

82 Conclusion Lateral collateral ligaments tears are due to varus force and often involve the conjoined tendon Patellofemoral ligament strains and tears should be sought in patients with PDRS Iliotibial band syndrome occurs in runners, with thickening and fluid deep to the iliotibial band

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