Resident Tutorial: Knee MR Basics
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Bones & Cartilage:
Fractures, Contusions & Avulsions
Case 9b: Tibial plateau fracture.
Case 3b: Lateral tibial plateau contusion
Case 19b: Contusion medial femoral condyle.
Case 37b, Case 119b Case 146b: Segond fracture with ACL tear.
Case 45b: Tibial tubercle avulsion
Case 53b: Occult lateral tibial plateau fracture
Case 73b: Occult fracture, distal femur
Case 49b, Case 70b: Avulsion of ACL insertion
Case 63b: ACL + deep lateral femoral sulcus
Case 116b: Contusion/microfracture lateral femoral condyle. Contrast between GRE and T2WI in detecting marrow edema.
Case 123b: Tibial plateau microfracture
Case 126b: Medial Segond injury with injury to MCL, PCL (origin) and ACL insertion avulsion. There is also a tear of the medial head of the gastrocnemius muscle
Case 132b: Occult tibial plateau fracture
Case 137b: Transverse patella fracture with large effusion
Case 138b: Avulsion fracture of fibular head / conjoined tendon insertion and a tear of the vastas lateralis
Case 140b: Avulsion of PCL insertion [CT case]
Case 141b: LCL avulsion (see also Case 138b)
Case 156b: PCL insertion avulsion
Case 167b: LCL avulsion/posterolateral corner injury & Segond fx with ACL tear
Case 171b: Medial tibial plateau fracture
Patterns of Bone Edema Indicating Specific Soft Tissue injury
Case 6b, Case 48bx, Case 91b, Case 108b, Case 165b, Case 181b: Lateral patellar dislocation
Case 18b, Case 145b: Terrible triad. ACL, MCL, medial meniscus tears.
Case 41b, Case 42b, Case 43b, Case 25b, Case 71b, Case 86b
Case 101b Case 109b: ACL tear + kissing contusions
Case 79b: Deep lateral femoral sulcus sign indicating ACL tear (see also Case 57b)
Case 63b: ACL + deep lateral femoral sulcus
Osteochondral and Chondral Injury
Case 10b: OCD Medial femoral condyle
Case 21b: Osteochondral defect lateral femoral condyle with intra-articular loose body.
Case 39b: Chondral defect LFC with loose fragment in joint.
Case 98b: Large medial femoral cartilage defect assoc. with meniscal tear
Case 99b: Marked articular cartilage loss, lateral compartment with meniscal tear associated
Case 100b: Tear of anterior and posterior horns of the lateral meniscus with a focal cartilage defect in the lateral femoral condyle posteriorly
Case 101b: Tear, posterior horn medial meniscus with meniscal cyst.
Popliteal cyst.Cartilage defect, medial femoral condyle.
Case 105b: Osteoarthritis with meniscal degenerative tears, cartilage loss and associated marrow edema. Large popliteal cyst with loose body.
Case 110b: Osteochondral defect, medial femoral condyle
Case 113b: Contusion medial femoral condyle with associated chondral defect
Case 118b: ACL tear, bowing of PCL and a full thickness defect in the lateral femoral cartilage and partial thickness defect in the lateral tibial articular cartilage
Case 128b: Grade IV chondromalacia, patellar cartilage.
Case 129b: Medial femoral cartilage defect with thinning of medial tibial cartilage
Case 131b: MCL tear, complete; tear, anterior horn lateral meniscus; osteochondral defect, lateral femoral condyle; focal cartilage defect, lateral tibial plateau
Case 133b: Osteochondral defect, lateral aspect of the medial femoral condyle (aka. osteochondritis dessicans)
Case 135b: Osteoarthritis(lateral and patellofemoral compartments) with cartilage loss and intra-articular loose bodies
Case 139b: Osteochondritis dessicans, lateral aspect medial femoral condyle
Case 147b: Chondromalacia, medial facet of patella (chondral blister)
Case 157b: Large posterior lateral femoral cartilage defect with multiple intra-articular loose bodies
Case 162b: Full thickness cartilage lesion lateral trochlea with corresponding defect in patellar cartilage
Case 163b: Full-thickness cartilage lesion, lateral femoral condyle at trochlea
Case 165b: Lateral patellar dislocation with medial facet chondral flap
Case 166b: Covered osteochondral defect, MFC, with small articular cartilage defect seen just anterior to the OCD
Case 173b: Full thickness cartilage defect, lateral facet of patella
Case 180b: MFC defect with fragment free in joint
Case 181b: Lateral patellar dislocation with large cartilage defect off lateral facet of patella and a detached lateral femoral condyle osteochondral fracture, the fragment sitting in the lateral capsular reflection.
Case 189b: Lateral femoral condyle osteochondral defect (OCD 45.440). The defect is covered by articular cartilage, an in-situ defect
Case 192b: Osteochondral defect, anterior lateral femoral condyle trochlear area with free fragment of cartilage in the posterior lateral recess of the joint
Fat fluid level:
Case 155b: "parfait" (triple layer) sign
Case 198b: Lateral tibial plateau fracture with fat-fluid level on plain film and "parfait" sign on MR
Resident Tutorial: Knee MR Basics-2
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