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Skel Rad B > Midterm > Flashcards

Midterm Flashcards

1
Q

What is the peak age range for Suppurative Osteomyelitis?

A

2-12 years

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2
Q

T or F

Suppurative osteomyelitis is seen 3:1 females to males

A

False

Males : females

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3
Q

What bone is the most common bone affected by osteomyelitis?

A

Femur

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4
Q

What microbe contributes to 90% of osteomyelitis cases?

A

Staph. Aureus

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5
Q

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

A

S joints

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6
Q

What is the most common route of spread of Osteomyelitis?

A

Hematogenous

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7
Q

What does Contiguous source mean?

A

Direct spread from another site of infection.

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8
Q

Name the different routes of infection for osteomyelitis

A

Heamtogenous
Contigous Source
Direct implantation
Post-operative

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9
Q

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

A

Strep group B

- humerus

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10
Q

T or F

The MC organism for childhood osteomyelitis is Staph Aureus

A

True

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11
Q

T or F

Only the epiphysis will be affected in infantile osteomyelitis

A

False

Epiphysis or metaphysis

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12
Q

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

A

Metaphysis

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13
Q

T or F

The vessels penetrate the growth plate in children

A

False

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14
Q

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

A

Epiphyseal and Metaphysis

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15
Q

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

A

Sequesterum

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16
Q

What is an Involucrum?

A

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

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17
Q

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

A

Cloaca

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18
Q

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

A

Discitis

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19
Q

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

A

3

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20
Q

Describe the soft tissue changes seen on radiographs with osteomyelitis

A

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

21
Q

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

A

10

22
Q

What pattern of bone destruction is typically seen with osteomyelitis?

A

Moth-eaten

23
Q

Describe the periosteal response with osteomyelitis

A

Solid or laminated

24
Q

What is a Brodie’s Abscess?

A

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

25
Q

Brodie’s Abscess likes what area of the body?

A

Distal tibia and knee

26
Q

What does Cystic TB look like on film?

A

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

27
Q

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

A

Tuberculous Dactylitis

28
Q

What is Pott’s Puffy Tumor?

A

TB of the skull with cold abscess of scalp.

29
Q

What is Weaver’s Bottom?

A

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

30
Q

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

A

Metaphysitis

  • present from birth
  • lucent metaphysical bands, medial tibial erosions.
31
Q

Phase 2 of Congential Syphilis?

A

Periostitis

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

32
Q

What is Saber Shin Deformity

A

Anterior convexity/bowing of tibias

33
Q

Gummata is associated with?

A

Acquired Tertiary syphilis

34
Q

Actinomycosis likes what part of the body?

A

Mandible *MC
Spine
Ribs
Pelvis

35
Q

What are the 4 phases of the development of Osteonecrosis

A
  1. Avascular Phase
  2. Revascularization Phase
  3. Repair Phase
  4. Deformity Phase
36
Q

T or F

Loss of blood supply, bone death, synovitis, hyperaemia fall under the Deformity phase of osteonecrosis

A

False

Avascular Phase

37
Q

What are some aka’s for Osteochondrosis

A

Osteonecrosis
Ischemic Necrosis
Avascular Necrosis

38
Q

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

A

Femoral Head

39
Q

What demographic suffers from Legg-Calve-Perthes?

A

Males 3-12 peak age

40
Q

List some imaging findings seen with Legg-Calve-Perthes

A 
Capsular distention
Joint space widening
Undergrowth of epiphysis
Flattening and Fragmentation
Solid or patchy sclerosis 
Lucent crescent sign
41
Q

Freiberg’s disease affects what part of the body?

A

Metatarsal heads especially 2nd

42
Q

T or F

Freiburg’s disease affects females most commonly from 13-18 years

A

True

43
Q

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

A

Keinboch’s

44
Q

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

A

Tarsal Navicular

Males around age 5

45
Q

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

A

Osgood-Schlatter’s

46
Q

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

A

Scheuermann’s (Idiopathic Spondylodystrophy)

47
Q

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

A

At least 3 levels

48
Q

What are the MC locations for Osteochondroses Dissecans?

A

Knee (femoral condyle)
Ankle
Elbow

Skel Rad B (2 decks)

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