Osteonecrosis and Osteochondrosis: Avascular necrosis types

Question 1

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

Answer 1

Keinbocks disease

mc in males

Question 2

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

Answer 2

males 20-40 yrs old

9:1

Question 3

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

Answer 3

Keinbocks disease

Question 4

What are the AKA’s for Keinbocks Disease?

Answer 4

Lunate malacia and Lunate OsteoChondrosis

Question 5

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

Answer 5

Kenbocks disease

Question 6

What are the radiographic features of Keinbocks disease?

Answer 6

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

Question 7

What two conditions are NOT due to osteonecrosis?

Answer 7

Osgood-Schlatter’s and Scheuermann’s disease

Question 8

Osgood-Schlatter’s effects what age group?

Answer 8

11-15 year old males

Question 9

Scheuermann’s effects what age group?

Answer 9

13-17 sligtly more M>F

Question 10

what condition is due to partial disruption of tibial tuberosity?

Answer 10

osgood-schlatter’s

Question 11

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

Answer 11

osgood schlatters

Question 12

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

Answer 12

Osgood-schlatter’s

Question 13

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

Answer 13

Osgood-schlatter

Question 14

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

Answer 14

isolated, irregular ossicles

Ant. surface irregularities

Question 15

Blurring of Hoff’s fat indicates what?

Answer 15

Joint effusion

Question 16

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

Answer 16

Scheuermann’s disease

Question 17

What disruption possibly causes scheuermann’s disease?

Answer 17

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

Question 18

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

Answer 18

Scheuermann

Question 19

What clinical features are seen in Scheuermann’s disease

Answer 19

Back pain, fatigue and deformity

mc cause of structural Kyphosis in 13-17 yoa

Question 20

Scheuermann’s predisposes males later in life to what?

Answer 20

Herniation and spondylosis

Question 21

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

Answer 21

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

Question 22

Osteochondritis dissecans AKA

Answer 22

Koenigs disease

Question 23

Small necrotic segment of subchondral bone is characteristic of what?

Answer 23

Osteochondritis Dissecans aka Koenigs disease

Question 24

Osteochondritis Dissecans most commly effect what age group?

Answer 24

males 11-20 yoa

Question 25

MC location for osteochondritis dissecan is where?

Answer 25

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

Question 26

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

Answer 26

In situ and Displaced

Question 27

In situ type of separated fragment from the host bone is a ? | How does it behave?

Answer 27

arc-like radiolucent cleft | it may revascularize and reattach AND remains asymptomatic

Question 28

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

Answer 28

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

Question 29

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

Answer 29

Tarsal navicular and mc in M 4-6 yoa

Question 30

what are the symptoms for Kohlers disease? | What is its differential and what does it mimic?

Answer 30

local pain, swelling, tenderness | Growth variant

Question 31

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

Answer 31

kohlers disease

Question 32

What is considered an avascular necrosis of the scaphoid

Answer 32

preiser's disease

Question 33

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

Answer 33

Avascular necrosis of preiser's disease

Question 34

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

Answer 34

Throwing | mc in M 4-10 yoa

Question 35

what AVN trauma may be accompanied by STIFFNESS

Answer 35

Panner's OR AVN of capitellum

Question 36

What condition shows evidence of healing after 2 years?

Answer 36

AVN of capitellum OR Panner's disease

Question 37

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

Answer 37

Reossification

Question 38

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

Answer 38

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

Question 39

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

Answer 39

infammatory disorder | affects calcaneal growth plate = mc young athletes 10-13

Question 40

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

Answer 40

Sever's disease

Question 41

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

Answer 41

Sever's disease

Question 42

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

Answer 42

Calcaneal Apophysitis

Question 43

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

Answer 43

Sever's disease; pt may be asymptomatic

Question 44

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

Answer 44

True

Question 45

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

Answer 45

Mid thoracic