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TABLE OF CONTENTS: Knee MRI
Case 1b: Normal meniscofemoral ligament.
Case 2b: Discoid lateral meniscus
Case 3b: Lateral tibial plateau contusion
Case 4b: Prepatellar bursitis
Case 5b: Defect, medial facet of patella.
Case 6b: Lateral patellar dislocation.
Case 7b: Cyclops lesion, ACL reconstruction.
Case 8b: ACL ganglion.
Case 9b: Tibial plateau fracture.
Case 10b: Osteochondral lesion medial femoral condyle.
Case 11b: Anterior cruciate ligament tear.
Case 12b: Iliotibial band syndrome.
Case 13b: Bucket handle tear,with "double PCL" sign.
Case 14b: Posterior horn lateral meniscus tear with meniscal cyst.
Case 15b: Posterior horn medial meniscus tear; incidental NOF
Case 16b: Popliteal (Baker's)cyst.
Case 17b: Chondromalacia, medial facet of patella.
Case 18b: Terrible triad. ACL, MCL, medial meniscus tears.
Case 19b: Contusion medial femoral condyle.
Case 20b: Discoid lateral meniscus with tear.
Case 21b: Osteochondral defect lateral femoral condyle with intra-articular loose body.
Case 22b: Discoid lateral meniscus with tear.
Case 23b: Osteochondritis dessicans (osteochondral defect)
Case 24b: ACL tear with lateral femoral condyle contusion.
Case 25b: ACL tear with "kissing contusions".
Case 26b: ACL tear
Case 27b: Bucket handle tear posterior horn medial meniscus.
Case 28b: Discoid lateral meniscus with tear.
Case 29b: Bucket handle tear post. horn, med. meniscus with "double PCL" sign.
Case 30b: Iliotibial band syndrome (see also Case 89b)
Case 31b: Tears lateral meniscus, popliteus muscle
Case 32b: Patellar cartilage injury, apex and medial facet.
Case 33b: Bucket handle tear posterior horn of lateral meniscus
Case 34b: Posterior horn lateral meniscus tear with meniscal cyst.
Case 35b: Patellar tendon rupture.
Case 36b: Tear posterior horn medial meniscus with small meniscal cyst
Case 37b: Segond fracture with ACL tear.
Case 38b: Tear, posterior horn medial meniscus with meniscal cyst.
Case 39b: Chondral defect LFC with loose fragment in joint.
Case 40b: Bucket handle tear medial meniscus with "double PCL sign."
Case 41b: ACL tear with "kissing contusions."
Case 42b: ACL tear with "kissing contusions".
Case 43b: ACL tear with contusions. Note anterior drawer sign.
Case 44b: ACL tear.
Case 45b: Tibial tubercle avulsion
Case 46b: Posterolateral dislocation of knee with lateral patella dislocation
Case 47b: Spontaneous osteonecrosis, medial femoral condyle
Case 48bx: Lateral dislocation of the patella
Case 49b: Avulsion of ACL insertion (tibial spine)
Case 50b: Bucket handle tear, posterior horn lateral meniscus with anterior displacement
Case 51b: Bucket handle tear posterior horn lateral meniscus, with displacement of the posterior horn anteriorly
Case 52b: Prepatellar bursitis
Case 53b: Occult lateral tibial plateau fracture
Case 54b: Posterolateral corner injury injury following hyperextension injury and knee dislocation
Case 55b: Posterolateral corner injury injury following varus injury to the knee-marked lateral capsular stripping
Case 56b: Posterolateral corner injury with marked lateral capsular
stripping, avulsion of the tibial attachments of the lateral meniscus,
and widening of the lateral joint space
Case 57b: Deep lateral femoral notch sign with intact ACL reconstruction
Case 58b: ACL reconstruction with "cyclops lesion"
Case 59b: Patellar tendinosis or "jumper's knee"
Case 60b: Discoid lateral meniscus
Case 61b: "Jumper's knee" (see also Case 59b)
Case 62b: Medial meniscus tear with large meniscal cyst
Case 63b: ACL tear/ marked deep lateral femoral sulcus compression fracture & anterior drawer sign
Case 64b: PCL tear secondary to dashboard injury
Case 65b: Discoid lateral meniscus
Case 66b: Classic ACL tear with PCL changes and contusions
Case 67b: Osteochondroma, distal femur
Case 68b: Patellar tendon, ACL, intra-substance PCL tears and a peripheral tear, posterior horn medial meniscus
Case 69b: Partial tear, origin, patellar tendon
Case 70b: ACL insertion avulsion fx
Case 71b: ACL tear with "kissing contusions"
Case 72b: Bucket-handle tear lateral meniscus with displacement from posterior to anterior
Case 73b: Occult fracture, distal femur
Case 74b: Tear,posterior horn medial meniscus with small meniscal cyst
Case 75b: PCL tear secondary to impact of the anterior tibia on the dashboard during an MVA
Case 76b: Lipoma, superficial soft tissues, posterior knee
Case 77b: Synovial chondromatosis progressing to synovial osteochondromatosis
Case 78b: Intra-osseous lipoma
Case 79b: Deep lateral sulcus sign on plain films indicating ACL tear
Case 80b: Partial tear, intra-substance, PCL (presumed, not scoped)
Case 81b: Radial tear(ie.free edge tear, parrot beak tear), medial meniscus
Case 82b: Probable stress reaction, anterior distal femur in a female long distance runner
Case 83b: Radial tear, medial meniscus
Case 84b: Anterior horn, lateral meniscus true tear & "pseudotear"
Case 85b: Peripheral, vertical tear posterior horn, medial meniscus
Case 86b: Presumed complete tear, ACL
Case 87b: Bucket-handle tear, posterior horn, medial meniscus
Case 88b: Bucket-handle tear, posterior horn, medial meniscus with "double PCL" sign
Case 89b: Iliotibial band friction syndrome. (see also Case 30b)
Case 90b: Prepatellar bursitis (see also Case 4b and Case 52b).
Case 91b: Lateral patellar dislocation with partial disruption of the medial retinaculum
Case 92b: Anterior horn medial meniscal "pseudotear" from the transverse ligament
Case 93b: Meniscal "pseudotear", posterior horn lateral meniscus caused by a prominent meniscofemoral ligament.
Case 94b: Radial tear, lateral meniscus
Case 95b: Disruption of ACL graft with "cyclops lesion" (fibrosis) in the anterior joint space
Case 96b: The so-called "speckled anterior horn,"lateral meniscus, a normal variant created by the insertion of the ACL
Case 97b: "Ghost" meniscus appearance of the lateral meniscus with diffuse
internal signal probably indicating intrasubstance degeneration along
with a tear of the anterior horn.
Case 98b: Tear posterior horn medial meniscus, medial meniscal cyst, medial femoral cartilage defect, popliteal cyst
Case 99b: Absent posterior horn, lateral meniscus, complete absence of the lateral articular cartilage
Case 100b:Tear of anterior and posterior horns of the lateral meniscus with
a focal cartilage defect in the lateral femoral condyle
Case 101b: Tear, posterior horn medial meniscus with meniscal cyst.
Popliteal cyst. Cartilage defect, medial femoral condyle.
Case 102b: ACL tear with "kissing contusions"
Case 103b: Tear medial, medial meniscus
Case 104b: Radial tear, medial meniscus
Case 105b: Osteoarthritis with meniscal degenerative tears, cartilage loss
and associated marrow edema. Large popliteal cyst with loose body
Case 106b: Lateral meniscal tear with large meniscal cyst
Case 107b: Probable spontaneous osteonecrosis (SON), lateral femoral condyle, post-menisectomy
Case 108b: Lateral patellar dislocation
Case 109b: Bucket handle tear, posterior horn lateral meniscus, peripheral tear, posterior horn medial meniscus,ACL tear.
Case 110b: Osteochondral defect, medial femoral condyle
Case 111b: Iliotibial band friction syndrome (see also Case 30b & Case 89b)
Case 112b: ACL tear, "kissing contusions" anterior lateral femoral
condyle-posterior tibial plateau, presumed tear of the meniscofemoral
ligament
Case 113b: Contusion medial femoral condyle with associated chondral defect
Case 114b: ACL tear, proximal aspect
Case 115b: PCL tear, mid substance
Case 116b: Contusion/microfracture lateral femoral condyle
Case 117b: Bucket handle tear, posterior horn medial meniscus
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 119b: Segond fracture with ACL tear and kissing contusions
Case 120b: Posterolateral corner injury with tear of popliteus muscle and
musculotendinous junction and tear of arcuate ligament with ACL tear
Case 121b: Bucket handle tear, posterior horn of medial meniscus with "double PCL" sign
Case 122b: Complex tear, posterior horn, medial meniscus
Case 123b: ACL tear, probable tear of meniscofemoral ligament , lateral
tibial plateau microfracture, "pseudotear" of the posterior horn of the
lateral meniscus caused by the insertion of MFL onto the meniscus
Case 124b: Tear anterior horn, lateral meniscus, with large meniscal cyst
Case 125b: Popliteus tendon tear / posterolateral corner injury
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 127b: Anterolateral ganglion arising from the proximal tibio-fibular joint
Case 128b: Grade IV chondromalacia, patellar cartilage.
Case 129b: Medial femoral cartilage defect with thinning of medial tibial cartilage
Case 130b: ACL tear; popliteus tendon tear at insertion; partial tear, LCL.
Case 131b: MCL tear, complete; tear, anterior horn lateral meniscus;
osteochondral defect, lateral femoral condyle; focal cartilage defect,
lateral tibial plateau
Case 132b: Occult tibial plateau fracture
Case 133b: Osteochondral defect, lateral aspect of the medial femoral condyle (aka. osteochondritis dessicans)
Case 134b: Bucket-handle tear, posterior horn of the lateral meniscus with anterior displacement of the fragment
Case 135b: Osteoarthritis(lateral and patellofemoral compartments) with cartilage loss and intra-articular loose bodies
Case 136b: Ganglion, posterior aspect, proximal tibiofibular joint (see also Case 127b)
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 139b: Osteochondritis dessicans, lateral aspect medial femoral condyle
Case 140b: PCL avulsion [CT / plain film study]
Case 141b: LCL avulsion (see also "Case 138b ")
Case 142b: Bucket-handle tear, posterior horn, medial meniscus
Case 143b: Radial tear, medial meniscus
Case 144b: Pseudo-tears of the lateral meniscus caused by ligamentous insertions on anterior and posterior horns
Case 145b: "Terrible triad": MCL, medial meniscus, ACL tears
Case 146b: Segond fracture (lateral capsular avulsion) has a high association with ACL tear
Case 147b: Chondromalacia, medial facet of patella
Case 148b: "Blooming artifact" on gradient echo image
Case 149b: Lateral meniscal tear and mensical cyst
Case 150b: Partial tear musculotendinous junction of popliteus (posterolateral corner injury)
Case 151b: Posterolateral corner injury (LCL avulsion, popliteal tendon rupture at M-T junction), ACL tear
Case 152b: Tibial plateau erosions in a patient with rheumatoid arthritis
Case 153b: Pigmented villonodular synovitis
Case 154b: ACL tear with "wavy" patellar tendon
Case 155b: Fat fluid level in knee with "parfait" sign
Case 156b: PCL insertion avulsion, lateral meniscus bucket-handle tear (into notch)
Case 157b: Large posterior lateral femoral cartilage defect with multiple intra-articular loose bodies
Case 158b: Ruptured popliteal cyst
Case 159b: AML with widespread marrow involvement
Case 160b: Spontaneous osteonecrosis (SONC) (see also Case 47b and Case 107b)
Case 161b: Lateral meniscus tear
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 164b: Displaced medial meniscus tear-"medial flipped meniscus"
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 (MRA knee)
Case 167b: LCL avulsion/posterolateral corner injury & Segond fx with ACL tear
Case 168b: Anterior tibial fracture, PCL (origin) avulsion, posterolateral corner injury.
Case 169b: Popliteal cyst + tear posterior horn medial meniscus
Case 170b: Traumatic pre-patellar bursal fluid collection
Case 171b: Medial tibial plateau fracture: "occult"
Case 172b: Patient was on high dose steroids: AVN and multiple bone infarcts
Case 173b: Full thickness cartilage defect, lateral facet of patella
Case 174b: ACL tear with "bowing' of the PCL. The "question mark [?]" look
to the PCL is a reflection of an anterior drawer sign
Case 175b: Large loose body in a ganglion arising near, or possibly within the tendon sheath of the popliteus muscle.
Case 176b: Popliteal cyst and complex ganglion arising from popliteus tendon sheath
Case 177b: Patellar tendon rupture, with patella alta
Case 178b: Tear, posterior horn of lateral meniscus with posterior
displacement out of joint. Also, peripheral tear, posterior horn,
medial meniscus.
Case 179b: True bucket-handle tear of the lateral meniscus, flipped into the notch
Case 180b: ACL tear, large medial femoral condyle cartilage defect (the
piece is sitting anteriorly and medially-see below), complex radial
tear medial meniscus, popliteal cyst with loose body
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 182b: Spontaneous osteonecrosis (SONC) (45.440)
Case 183b: Partial tear, PCL
Case 184b: Discoid lateral meniscus with multiple tears
Case 185b: Discoid lateral meniscus with small radial tear
Case 186b: Hematoma, medial head of gastrocnemius muscle
Case 187b: Normal ACL reconstruction
Case 188b: Two cases of complications of ACL reconstruction: Case A:
improper placement of the tibial tunnel-too anterior and Case B: failed
ACL graft.
Case 189b: Lateral femoral condyle osteochondral
defect (OCD 45.440). The defect is covered by articular cartilage, an
in-situ defect
Case 190b: Peroneal nerve sheath tumor with
atrophy (T1WI) and increased signal (STIR) compatible with denervation
in the Tibialis Anterior muscle
Case 191b: Complex tear of lateral meniscus with horizontal and radial components
Case 192b: Osteochondral defect, anterior lateral femoral condyle trochlear
area with free fragment of cartilage in the posterior lateral recess of
the joint
Case 193b: Bucket handle tear, posterior horn medial
meniscus. The displaced fragment is anterior and partly toward the
notch
Case 194b: Displaced medial meniscus tear, displaced medially
Case 195b: Failed ACL graft (45.450)
Case 196b: Failed ACL graft
Case 197b: Near complete tear, LCL. This was an isolated injury.
Case 198b: Lateral tibial plateau fracture with fat-fluid level on plain film and "parfait" sign on MR
"Case 199b"
Knee MRI Cases
Normal MR Anatomy: http://www.indyrad.iupui.edu/learning/mriatlasinfo.html
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