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Flashcards in Lesson 3C (Part 1) Deck (35)
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1

What are 6 examples of US characteristics?

1. Margins
2. Shape
3. Echogenicity
4. Echotexture
5. Orientation
6. Posterior acoustic attenuation pattern

2

Margins

Degree of irregularity

3

What are the margins of benign tumours?

Smooth

4

What are the margins of malignant tumours? (2)

1. Aggressive
2. Finger-like extensions
- spiculations

5

What are 3 defining shapes of masses/lesions?

1. Ovoid
2. Irregular
3. Lobulated or spherical

6

What are the shapes of benign tumours?

Spherical/ovoid
- smooth, round or egg shape

7

How many lobulations do benign tumours have?

3 or less gentle lobulations

8

What are the shapes of malignant tumours?

Variable/irregular

9

What is the echogenicity of benign tumours? (2)

1. Homogenous
2. Uniform internal echoes

10

What is the echogenicity of malignant tumours?

Heterogeneous
- variety of echotextures, predominately hypoechoic

11

Posterior acoustic attenuation pattern

Degree of sound beam absorption

12

What is the posterior acoustic attenuation pattern of benign solid tumour?

Minimal through transmission
- little shadow

13

What is the posterior acoustic attenuation pattern of benign cystic lesion?

High transmission of sound
- lots of shadow

14

What is the posterior acoustic attenuation pattern of a malignant tumour?

Absorb the sound beams and cause echoes posterior to their location to be very black and chaotic
- random/chaotic shadowing

15

What do simple cysts look like on US? (5)

1. Completely anechoic
2. Well-circumscribed
3. Thinly-encapsulated
4. Enhanced through transmission
5. Thinly-edged shadows

16

What do malignant masses look like on US? (6)

1. Variable shapes
2. Irregular, ill-defined borders, angular
3. Low-level, non-uniform internal echoes
4. Taller than wide
5. Posterior attenuation
6. Thick echogenic rim

17

What is the number one indicator for malignancy?

Spiculation
- finger like projections

18

What kind of pattern does acoustic shadowing have with malignancy? (3)

1. Irregular
2. Dirty
3. Chaotic pattern

19

How can you tell if it is definitely benign?

Total sbsence of any malignant characteristics

20

BI-RADS

Breast Imaging Reporting and Data System

21

Breast Imaging Reporting and Data System

Is a quality assurance guide designed to standardize breast imaging reporting and facilitate outcome monitoring

22

What does 0 tell us on the BI-RADS scale?

Incomplete and additional imaging evaluation is needed

23

What does 1 tell us on the BI-RADS scale?

Negative

24

What does 2 tell us on the BI-RADS scale?

Benign

25

What does 3 tell us on the BI-RADS scale?

Probably benign
- short internal follow up is recommended

26

What does 4 tell us on the BI-RADS scale?

Suspicious
- biopsy

27

What does 4A tell us on the BI-RADS scale?

Low suspicion

28

What does 4B tell us on the BI-RADS scale?

Intermediate suspicion

29

What does 4C tell us on the BI-RADS scale?

Moderate suspicion

30

What does 5 tell us on the BI-RADS scale?

Highly suggestive of malignancy
- biopsy