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Tumors > Roetgen Signs > Flashcards

Roetgen Signs Flashcards

1
Q

How much of a decrease in bone density do you need in order to see a lesion on an X-ray?

A

30-50%

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2
Q

How big does the lesion have to be in order to be seen on an X-ray?

A

1-5cm

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3
Q

What is the radiographic latent period for osteomyelitis in peripheral bone?

A

10-14 days

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4
Q

What is the radiographic latent period for spinal osteomyelitis?

A

21 days

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5
Q

What is the radiographic latent period for aggressive tumors?

A

4-6 weeks

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6
Q

What are evidence-based guidelines to assist referring physicians and other providers in making the
most appropriate imaging or treatment decision for a specific clinical condition?

A

ACR Appropriateness criteria

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7
Q

What is an Injection of water soluble iodinated contrast into IVD’s nucleus pulposus via fluoroscopic control in order to determine pain generator?

A

Discography

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8
Q

What is the pattern of Distribution of Contrast for Discography?

A

fissuring, extravasation, pooling of contrast

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9
Q

What phase of the bone scan is when you scan 5 minutes after the injection?

A

Blood Pool Phase

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10
Q

What phase of the bone scan is when you scan 2-4 hours after injection?

A

Delayed Phase

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11
Q

What phase of the bone scan is when you scan 24 hours after injection?

A

Delayed/delayed Phase

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12
Q

What views areas of bone where bones overlap e.g. pars

interarticularis?

A

SPECT scan

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13
Q

What imaging system is extremely sensitive for detecting bone marrow disease?

A

MRI

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14
Q

What kind of cells partake in intramembranous ossification?

A

Mesenchymal cells

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15
Q

What kind of bone growth controls width of long bones via activity of periosteum?

A

Appositional bone growth

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16
Q

T/F: Not seen on x ray, but seen on MRI

17
Q

What is a thin radiopaque line at junction of physis and metaphysis?

A

Zone of Provisional Calcification (ZOPC)

18
Q

What is the most metabolically active region of a bone and the most common site for tumors and infection?

A

Metaphysis

19
Q

What is the term used when bones appear wider than usual?

A

Undertubulation

20
Q

What is the densest and strongest part of bone?

21
Q

Where is the red bone marrow in adults located?

A

axial skeleton, epiphyses, and metaphyses

22
Q

What type of lesion involves thinning of the cortex along the endosteal surface of the medullary cavity?

A

endosteal scalloping

23
Q

Is Imperceptable margination lesion slow or aggressive type of lesion?

A

Aggressive

24
Q

Is sharp margination lesion slow or aggressive type of lesion?

25
Q

What type of lesion contains multiple, poorly defined, small radiolucent lesions, 2-5mm in size, and are aggressive lytic lesions?

A

Moth-eaten lesion

26
Q

What type of lesion is the most rapidly aggressive bone tumors that contains numerous, tiny, pinhole size lesions?

A

Permeative lesion

27
Q

What type of lesion contains an increased density due to overproduction of bone or calcium laden tissue?

A

Osteoblastic lesion

28
Q

What type of reaction involves a continuous layer of new bone that attaches to outer cortex and is slow growing?

A

Solid Periosteal Reaction

29
Q

What type of reaction involves an alternating layers of lucent and opaque densities on external cortical surface and is aggressive?

A

Laminated Reaction (onion skin)

30
Q

What type of reaction is Perpendicular, brushed whiskers, hair on end and are aggressive tumors?

A

Spiculated Periosteal Reactions

31
Q

What is known as a periosteal new bone at the peripheral lesion – cortex junction as result of subperiosteal extension of lesion?

A

Codman’s Triangle

32
Q

What type of laboratory test has an Increased tendency of rbc’s to precipitate out due to increased concentrations of fibrinogen and is especially good for Inflammatory Diseases?

33
Q

What laboratory test is from being released by the liver and is due to inflammatory changes or tissue necrosis?

34
Q

What lab test is used with disorders of bone destruction and disorders of increased parathormone activity?

A

Serum Calcium

35
Q

What lab test is an Indicator of bone destruction and an important indicator of bone activity?

A

Serum Phosphorus

36
Q

What lab test reflects an increase in osteoblastic activity and is increased in Paget’s disease and METs?

A

Alkaline Phosphatase

37
Q

What lab test is increased in Prostate metastasis

and Gaucher’s disease and is located in the Prostate gland?

A

Acid Phosphatase

38
Q

What does an elevated total serum protein indicate?

A

METs or Multiple Myeloma

Tumors (8 decks)

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