FinalQuizlet

Question 1

Infection of skin, subcutaneous fat, or CT (tendons/ligs/muscles)

Answer 1

cellulitis

Question 2

infection of bone (marrow spaces)

Answer 2

osteomyelitis

Question 3

infection of joint (synovial tissue or articular surfaces)

Answer 3

septic arthritis

Question 4

Drug addicts are MORE PRONE to __ joint infections?

Answer 4

S (sacroiliac, sternoclavicular, symphysis pubis, spine, etc.)

Question 5

The MC infectious organism

Answer 5

staphylococcus aureus

Question 6

MC route of dissemination for an infection

Answer 6

hematogenous

Question 7

growth plates INHIBIT only __ spread of infections?

Answer 7

hematogenous

Question 8

MC location for an infection in the body?

Answer 8

KNEE

Question 9

two major categories of musculoskeletal infection

Answer 9

1. suppurative (pus) caused by staphylococcus aureus

2. non-supporative (Tb)

Question 10

Which stage has s/s present for 1-10 days before it can actually be seen on a radiograph?

Answer 10

latent (hidden) stage

Question 11

during LATE stage -chalky white area of isolated dead bone?

Answer 11

sequestrum

Question 12

Brodie’s abscess formation:

• caused by what infection?
• localized pain that’s worse at night Pain is relieved by NSAID. Mimics what tumor?

Answer 12

osteomyelitis (bone marrow)

osteoid osteoma

Question 13

Ddx for infection vs. tumor

Answer 13

infection no respect for GP or jt space

Question 14

Early radiographic finding of infection at hips would be an increased __ of greater than __ mm?

Answer 14

teardrop distance: 11mm

Question 15

___ have sacroilitis/SI joint infections MC than any other?

Answer 15

Intravenous drug users

Question 16

MC spinal site for spinal infection

Answer 16

lumbar spine

Question 17

t/f, plain films are NOT sensitive exams to things like tumors or infections?

Answer 17

TRUE

Question 18

OM MRI Findings

Answer 18

decreased signal on T1 increasead on T2

Question 19

radiographic latency period is __ days long ?

Answer 19

10

Question 20

MC cause of infection-related death ww is (king of disease) ?

Answer 20

tuberculosis

Question 21

Tb (nonsuppurative osteomyelitis) is aka ___?

Answer 21

pott’s disease

Question 22

Primary Tb location

Secondary Tb MC in

Answer 22

lungs, spine multi level

Question 23

• paraspinal cold abcessesw/Ca
• gibbus formation
• s/s include fever, chills, night sweats, weight loss

Answer 23

Tb

Question 24

Phemister’s triad is made up of what 3 components? “phemister’s JaMS!!!!”

Answer 24

1. juxtarticular osteoporosis
2. marginal erosion
3. slow joint space loss

Question 25

MC location for AVN; AVN has epiphyseal predisposition especially for __

Answer 25

HIP, femur and humeral head

Question 26

Causes of AVN? (plastic rags)

Answer 26

``` pancreatitis/pregnancy Legg-calve-perthes/Lupus Alcoholism/atherosclerosis Steroids Trauma Idiopathic/infection Caisson disease/collagen disease RA/radiation tx Amyloid Gaucher disease Sickle cell disease ```

Question 27

4 stages of AVN?

Answer 27

1. avascular 2. revascularization 3. repair 4. deformity

Question 28

Results from medullary bone falling away from the cortex, leaving a radiolucent line between the medullary cavity and the cortex?

Answer 28

Cresecent/Rim sign

Question 29

AVN of a child's femoral head

Answer 29

legg-calve-perthes disease

Question 30

AVN in an adult femoral head

Answer 30

Chandler's disease

Question 31

BIG 4 radiographic signs of AVN?

Answer 31

1. snow cap sign 2. crescent/rim sign 3. mushroom deformity 4. hanging rope sign

Question 32

-List 3 signs you'll see on a radiograph ?

Answer 32

ANSWERS:

Question 33

1. small epiphysis 2. ST swelling (inc. TDD >11mm) 3. lateral displacement of ossification center

Answer 33

Radiographic signs of Legg-Calve-Perthes disease

Question 34

adolescent males, MC knee medial femoral condyle, joint mouse rad finding

Answer 34

Osteochondrosis dessicans

Question 35

AVN of the knee, associated with medial meniscal lesions

Answer 35

SONK spontaneous osteonecrosis of the knee

Question 36

Fragmentation of tibial tuberosity apophysis

Answer 36

Osgood Schlatters

Question 37

AVN of 2nd metatarsal head, females

Answer 37

Friebergs disease

Question 38

AVN of lunate, males 20-40, ulnar variance

Answer 38

Keinbocks disease

Question 39

AVN or normal anatomy of tarsal navicular

Answer 39

Koehler's disease

Question 40

- Not a necrosis - increased kyphosis - 5degree anterior body wedging in 3 or more contiguous vertebrae - Schmorl's nodes present

Answer 40

Scheuermann's disease/Juvenile discogenic disease

Question 41

sclerosis and fragmentation of calcaneal apophysis

Answer 41

Sever's disease

Question 42

Serpiginous like regions of calcification within the bone medulla

Answer 42

calcified medullary infarct

Question 43

MC in AAs - pain and swelling hands & feet - salmonella OM predisposition - infarct of bowel following obstruction of mesenteric arteries

Answer 43

sickle cell anemia

Question 44

sickle cell anemia rad Findings

Answer 44

- H shaped vertebrae - hair on end skull - long bone underturbulation

Question 45

Thalassemia has what type of trabeculation pattern ?

Answer 45

honeycomb

Question 46

what two diseases have hair on end skull and which is MORE predominate?

Answer 46

Sickle Cell Anemaia and Thalassemia *more predominate

Question 47

MC hemolytic anemia?

Answer 47

sickle cell anemia

Question 48

Hemophilia two distinct radiographic features

Answer 48

1. square femoral condyles | 2. widened intercondylar notch

Question 49

bony collar where pus lifts periosteum and causes new bone formation?

Answer 49

involucrum

Question 50

ulcerative channel/sinus in bone?

Answer 50

cloca