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MSK > MRI > Flashcards

MRI Flashcards

1
Q

What ist he most common meniscal tear?

A

Oblique tear through the posterior horn of the medial meniscus

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2
Q

Which side is a discoid meniscus more common?

A

Lateral

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3
Q

What is the associatied finding with discoid menisci?

A

Higher risk of tear

Meniscal cysts

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4
Q

Why is it important to describe a tear with a meniscal cyst?

A

Changes the surgical approach from percutaneous to intraarticular

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5
Q

What is the association with spinoglenoid ganglion cysts other than infraspinatus atrophy? Who gets them?

A

Posterior labral tears

athletic, weightlifters

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6
Q

What muscle is affected in quadrilateral space syndrome? What are the borders?

A

Teres minor

Humerus - lateral
Teres minor - superior
Teres major - inferior
Long head of triceps - medial

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7
Q

What is parsonage Turner? What are the associations?

A

Brachial plexus neuritis - neurogenic edema in a muscle group supplied by a brachial plexus nerve

Vaccination, viral illness, anaesthesia

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8
Q

What is the difference between tenosynovitis, tendinosis, partial tear, and disruption?

A

Tenosynovitis - fluid in the tendon sheath with normal appearing tendon

Tendinosis - increased signal in a tendon that doesnt get fluid bright

Partial tear - fluid signal within the tendon

Disruption - absence of tendon on one or more images

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9
Q

What is associated with achilles tendon rupture?

A

RA, collagen vascular diseases, crystal deposition diseases, hyperparathyroidism

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10
Q

Can the achilles tendon have tenosynovitis?

A

No, there is no tendon sheath

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11
Q

What systemic disease is associated with PTT rupture?

A

RA

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12
Q

Where is the PTT most commonly torn? What results clinically?

A

Tibiotalar joint

Flat foot due to loss of PTT arch support

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13
Q

What structure is commonly torn with a PTT tear? 3rd most common?

A

Spring ligament

Sinus tarsi

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14
Q

What is a flake fracture?

A

Small bony avulsion off the fibula seen with a superior retinaculum disruption which displaces the peroneal tendons

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15
Q

What is the mechanism of injury in longitudinal split tears of the peroneus brevis? What is associated?

A

Inversion and dorsiflexion

Lateral ligamentous injury

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16
Q

What indicates an unstable OCD lesion?

A

Bright T2 signal

17
Q

What is the MR appearance of giant cell tumors of the tendon sheath?

A

Dark on T2 and T1

18
Q

What is tarsal tunnel syndrome?

A

Impingment of the the posterior tibial nerve in the tarsal tunnel, usually due to ganglion cyst as a result of trauma or fibrosis

19
Q

What 4 tumors are seen in the foot

A

SBC, GCT, Chondroblastoma, infection

20
Q

What is seen in anterolateral impingement syndrome?

A

Hypertrophy and scarring of the synovium in the lateral gutter of the ankle

21
Q

What are the three key MR findings in osteomyelitis of the foot?

A

Cortical disruption
Sinus tract
Bony abscess

22
Q

What is sinus tarsi sydrome? How is it seen on MR? What are the ligaments?

A

lateral ankle pain and hindfoot instability

Fat in sinus tarsi is dark on T1 and bright on T2

Cervical and interosseous ligaments

23
Q

What 4 conditions should always be looked for on ankle MR, especially if lateral ankle pain

A

ATFL disruption or scarring
Sinus tarsi syndrome
Longitudinal split tear of peroneous brevis
Anterolateral impingement

24
Q

What is the pathology in TMJ?

A

Anterior placed disc between mandibular condyle and temporal bone

25
Q

Where is the hip labrum most commonly torn?

A

Anterosuperior

26
Q

What are the findings of carpal tunnel

A

Flattened median nerve at the hook of the hamate
Enlarged median nerve at the level of the pisiform
Bowing retinaculum

27
Q

What is transient osteoporosis of the hip?

A

Painful hip with no other finding than osteoporosis of only the affected hip

Transient and self limited

MSK (8 decks)

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