Midterm

Question 1

What is the peak age range for Suppurative Osteomyelitis?

Answer 1

2-12 years

Question 2

T or F

Suppurative osteomyelitis is seen 3:1 females to males

Answer 2

False

Males : females

Question 3

What bone is the most common bone affected by osteomyelitis?

Answer 3

Femur

Question 4

What microbe contributes to 90% of osteomyelitis cases?

Answer 4

Staph. Aureus

Question 5

Pseudomonas which is common in drug addicts likes to migrate to what area of the body?

Answer 5

S joints

Question 6

What is the most common route of spread of Osteomyelitis?

Answer 6

Hematogenous

Question 7

What does Contiguous source mean?

Answer 7

Direct spread from another site of infection.

Question 8

Name the different routes of infection for osteomyelitis

Answer 8

Heamtogenous
Contigous Source
Direct implantation
Post-operative

Question 9

What microbe is common in infantile osteomyelitis? What is the common site?

Answer 9

Strep group B

- humerus

Question 10

T or F

The MC organism for childhood osteomyelitis is Staph Aureus

Answer 10

True

Question 11

T or F

Only the epiphysis will be affected in infantile osteomyelitis

Answer 11

False

Epiphysis or metaphysis

Question 12

Where is the most common site of origin of childhood osteomyelitis?

Answer 12

Metaphysis

Question 13

T or F

The vessels penetrate the growth plate in children

Answer 13

False

Question 14

In adults, Where in the long bones can osteomyelitis invade?

Answer 14

Epiphyseal and Metaphysis

Question 15

Necrotic bone separated from viable bone by granulation tissue is describing?

Answer 15

Sequesterum

Question 16

What is an Involucrum?

Answer 16

Living bone (periosteal rxn) that forms around necrotic bone and attempts to wall off the infection.

Question 17

The opening in involucrum that allows infected region to decompress is called?

Answer 17

Cloaca

Question 18

Infection of disc space, related to vbody osteomyelitis usually from hematogenous spread is termed…

Answer 18

Discitis

Question 19

We can see soft tissue changes within how many days of bone infection?

Answer 19

3

Question 20

Describe the soft tissue changes seen on radiographs with osteomyelitis

Answer 20

Localized swelling and fat plane displacement
Disruption of normal contour of skin
May see gas w/ certain organisms

Question 21

There is a ___ day latent period to see osseous changes on x-ray.

Answer 21

10

Question 22

What pattern of bone destruction is typically seen with osteomyelitis?

Answer 22

Moth-eaten

Question 23

Describe the periosteal response with osteomyelitis

Answer 23

Solid or laminated

Question 24

What is a Brodie’s Abscess?

Answer 24

A sharply outlined focus of burned out infection, which may be sterile or contain residual of Staph.

Question 25

Brodie's Abscess likes what area of the body?

Answer 25

Distal tibia and knee

Question 26

What does Cystic TB look like on film?

Answer 26

Round to oval lucent lesions in the appendicular skeleton that can mimic polyostotic tumor-like conditions.

Question 27

TB of the tubular bones of the hands/feet is called?

Answer 27

Tuberculous Dactylitis

Question 28

What is Pott's Puffy Tumor?

Answer 28

TB of the skull with cold abscess of scalp.

Question 29

What is Weaver's Bottom?

Answer 29

TB of the subgluteal bursa that extends into the ischial tuberosity.

Question 30

What is the first of 3 phases of radiographic features of Syphilitic Osteomyelitis Congenital

Answer 30

Metaphysitis - present from birth - lucent metaphysical bands, medial tibial erosions.

Question 31

Phase 2 of Congential Syphilis?

Answer 31

Periostitis | - symmetric, solid or laminated periosteal rxn that may affect long bones.

Question 32

What is Saber Shin Deformity

Answer 32

Anterior convexity/bowing of tibias

Question 33

Gummata is associated with?

Answer 33

Acquired Tertiary syphilis

Question 34

Actinomycosis likes what part of the body?

Answer 34

Mandible *MC Spine Ribs Pelvis

Question 35

What are the 4 phases of the development of Osteonecrosis

Answer 35

1. Avascular Phase 2. Revascularization Phase 3. Repair Phase 4. Deformity Phase

Question 36

T or F | Loss of blood supply, bone death, synovitis, hyperaemia fall under the Deformity phase of osteonecrosis

Answer 36

False Avascular Phase

Question 37

What are some aka's for Osteochondrosis

Answer 37

Osteonecrosis Ischemic Necrosis Avascular Necrosis

Question 38

In Legg-Calve-Perthes where in the body is affected

Answer 38

Femoral Head

Question 39

What demographic suffers from Legg-Calve-Perthes?

Answer 39

Males 3-12 peak age

Question 40

List some imaging findings seen with Legg-Calve-Perthes

Answer 40

``` Capsular distention Joint space widening Undergrowth of epiphysis Flattening and Fragmentation Solid or patchy sclerosis Lucent crescent sign ```

Question 41

Freiberg's disease affects what part of the body?

Answer 41

Metatarsal heads especially 2nd

Question 42

T or F | Freiburg's disease affects females most commonly from 13-18 years

Answer 42

True

Question 43

This type of osteonecrosis commonly affects the lunate and is usually secondary to trauma or excessive use.

Answer 43

Keinboch's

Question 44

Kohler's Osteonecrosis will affect what bone and what democraphic?

Answer 44

Tarsal Navicular | Males around age 5

Question 45

Fragmentation of the tibial tuberosity apophysis with overlying soft tissue inflammation is seen in what condition?

Answer 45

Osgood-Schlatter's

Question 46

Multiple Schmorl's nodes, endplate irregularities, anterior wedging of the vbodies and increased kyphosis is typical of what condition?

Answer 46

Scheuermann's (Idiopathic Spondylodystrophy)

Question 47

How many bodies need to be affected for it to be Scheuermann's?

Answer 47

At least 3 levels

Question 48

What are the MC locations for Osteochondroses Dissecans?

Answer 48

Knee (femoral condyle) Ankle Elbow