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Skeletal Radiology 1 CUKC > Osteonecrosis and Osteochondrosis: Avascular necrosis types > Flashcards

Osteonecrosis and Osteochondrosis: Avascular necrosis types Flashcards

test 3

1
Q

What condition is AVN of the lunate, worsens with pain, selling and disability? This condition is mc for who?

A

Keinbocks disease

mc in males

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2
Q

Keinbocks disease is most likely to occur in what age group? What is the ratio of occurance?

A

males 20-40 yrs old

9:1

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3
Q

what condition has a 75% occurance of Negative ulnar variance present with worsening pain, swelling and disability?

A

Keinbocks disease

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4
Q

What are the AKA’s for Keinbocks Disease?

A

Lunate malacia and Lunate OsteoChondrosis

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5
Q

what condition presents with swelling, worsening pain and possibility of disability?

A

Kenbocks disease

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6
Q

What are the radiographic features of Keinbocks disease?

A 
Altered bone density
Collapsed fracture 
lucent and sclerotic areas
subchondral fx on radial surface of lunate
secondary degenerative changes
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7
Q

What two conditions are NOT due to osteonecrosis?

A

Osgood-Schlatter’s and Scheuermann’s disease

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8
Q

Osgood-Schlatter’s effects what age group?

A

11-15 year old males

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9
Q

Scheuermann’s effects what age group?

A

13-17 sligtly more M>F

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10
Q

what condition is due to partial disruption of tibial tuberosity?

A

osgood-schlatter’s

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11
Q

What is caused by a Single violent injury or activity involving repetitive knee flexion?

A

osgood schlatters

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12
Q

This disease effects males 11-15, is bilateral up to 50% of the time and presents with the following symptoms: Pain, tendersness swelling over Tibial Tubercle

A

Osgood-schlatter’s

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13
Q

blurring of Hoffa’s fat is a soft tissue findings seen in what?

A

Osgood-schlatter

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14
Q

What osseous changes are seen in osgood-schlatter’s disease?

A

isolated, irregular ossicles

Ant. surface irregularities

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15
Q

Blurring of Hoff’s fat indicates what?

A

Joint effusion

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16
Q

Vertebral Epiphysitis, Juvenile kyphosis, Osteochondrosis and Juvenilis dorsi are AKA’s for what condition?

A

Scheuermann’s disease

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17
Q

What disruption possibly causes scheuermann’s disease?

A

Trauma to the epiphysis Ring -enplate fx (schmorl’s node) or traumatic growth arrest

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18
Q

What common disorder is seen slightly more in males 13-17 yoa?

A

Scheuermann

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19
Q

What clinical features are seen in Scheuermann’s disease

A

Back pain, fatigue and deformity

mc cause of structural Kyphosis in 13-17 yoa

20
Q

Scheuermann’s predisposes males later in life to what?

A

Herniation and spondylosis

21
Q

What are the 3 most important radiographic findings of scheuermann’s that fit a diagnostic criteria?

A
  1. Kyphosis due to Ant. wedging invloving at least 3 contiguous vertebrae
  2. Irregular endplates (multiple schmorl’s nodes)
  3. Decreased dis height
22
Q

Osteochondritis dissecans AKA

A

Koenigs disease

23
Q

Small necrotic segment of subchondral bone is characteristic of what?

A

Osteochondritis Dissecans aka Koenigs disease

24
Q

Osteochondritis Dissecans most commly effect what age group?

A

males 11-20 yoa

25
Q

MC location for osteochondritis dissecan is where?

A

Lat. aspect of Medical condyle, Lat condyle, Medial Talar dome

26
Q

What are the two types fragement separations associated with osteochondritis Dissencans?

A

In situ and Displaced

27
Q

In situ type of separated fragment from the host bone is a ?

How does it behave?

A

arc-like radiolucent cleft

it may revascularize and reattach AND remains asymptomatic

28
Q

The displaced type of osteochondritis dissecans that is ?
produces what type of defect in the bone?
The fragement can be?

A

freely moveable or may be resorbed or grow
Concaved
purely cartilaginous or combo of bone/cartilage

29
Q

Kohler disease is AVN of the what? and is mc in what group?

A

Tarsal navicular and mc in M 4-6 yoa

30
Q

what are the symptoms for Kohlers disease?

What is its differential and what does it mimic?

A

local pain, swelling, tenderness

Growth variant

31
Q

What has the following radiographic features:
Patchy or homogenous sclerosis
colllapse and fragmentation
joint spaces preserved
reconstitution to a normal rad appearance is expected

A

kohlers disease

32
Q

What is considered an avascular necrosis of the scaphoid

A

preiser’s disease

33
Q

The more proximal a fx of scaphoid the more likely it is for pt to develop what

A

Avascular necrosis of preiser’s disease

34
Q

AVN of capitellum is due to trauma and what repetitive motion?
This condition is mc in?

A

Throwing

mc in M 4-10 yoa

35
Q

what AVN trauma may be accompanied by STIFFNESS

A

Panner’s OR AVN of capitellum

36
Q

What condition shows evidence of healing after 2 years?

A

AVN of capitellum OR Panner’s disease

37
Q

What is the distinctive radiographic feature of panner’s disease?

A

Reossification

38
Q

What 3 conditions were once thought to be due to avascular necrosis?

A

Severs disease, Osgood-Schlatter’s, Scheuermann’s disease

39
Q

Sever’s disease is what type of disorder and what does it affect?

A

infammatory disorder

affects calcaneal growth plate = mc young athletes 10-13

40
Q

MC cause of heel pain in young athletes 10-13 yoa?

A

Sever’s disease

41
Q

Repetitive micro-traumas pulling on the Achilles tendon and heel pain with activity are symptoms associated with what condition?

A

Sever’s disease

42
Q

Sever’s disease is not due to AVN but is due to

A

Calcaneal Apophysitis

43
Q

You may see sclerosis and fragmentation of the Calcaneal Apophysis in what condition?

A

Sever’s disease; pt may be asymptomatic

44
Q

Areas of necrotic bone are typically low signal on T1 weighted MR images. True or False

45
Q

The radiographic manifestations of Scheuermann’s disease are most often observed in what region of the spine?(be specific)

A

Mid thoracic

Skeletal Radiology 1 CUKC (15 decks)

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