Malignant Breast Pathology Flashcards

1
Q

Where do the majority of breast cancers occur? (hint: quadrants)

A

UOQ

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2
Q

What are the risk factors of breast CA?

A
  1. Increased age
  2. Female
  3. History of breast CA
  4. BRCA 1 and BRCA 2 genes
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3
Q

T or F? Breast CA is the leading cause of cancer in women?

A

FALSE: it’s the 2nd most common

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4
Q

What is non-invasive breast cancer termed?

A

Carcinoma in-situ

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5
Q

What are the two types of non-invasive carcinomas?

A

Lobular carcinoma in situ (LCIS)
Ductal carcinoma in situ (DCIS)

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6
Q

What is the most common non-invasive cancer?

A

DCIS - ductal carcinoma in situ

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7
Q

What is the difference between LCIS and DCIS?

A

LCIS is confined to the lobules or ducts within the lobules

DCIS is confined to within the DUCTS either in the lobules or surrounding lobules

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8
Q

Where are malignant cells located in DCIS?

A

Confined within the ducts and does not surround outside tissue

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9
Q

What is the earliest form of cancer that can be detected on ultrasound?

A

DCIS

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10
Q

SF of ductal carcinoma in situ (DCIS)?

A
  1. Microcalcifications
  2. Distension of ducts
  3. Hypoechoic mass
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11
Q

What is Paget disease?

A

Cancer of the epidermis of the nipple

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12
Q

What are patient symptoms of Paget disease?

A
  1. Nipple discharge
  2. Itching
  3. Eczema like crusting of nipple or redness
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13
Q

What does it mean when breast cancer is invasive?

A

It has spread to other tissues

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14
Q

What are two ways breast cancer can spread?

A
  1. Via blood
  2. Via lymphatics
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15
Q

What is the most common breast cancer?

A

Invasive ductal carcinoma (IDC)

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16
Q

Do invasive ductal carcinomas have a good prognosis?

A

NO

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17
Q

Which quadrant of the breast does IDC usually occur?

A

UOQ

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18
Q

SF of IDC?

A
  1. Hypoechoic
  2. Spiculated
  3. Irregular shaped
  4. Microcalcifications
  5. Shadowing
  6. Non-parallel
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19
Q

What is the second most invasive breast malignancy?

A

Invasive lobular carcinoma (ILC)

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20
Q

Why does ILC have higher rates of being multifocal, multicentric and bilateral than IDC?

A

Because it’s diffuse rather than focal

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21
Q

SF of invasive lobular carcinoma (ILC)?

A
  1. Hypoechoic
  2. Spiculated
  3. Irregular, ill-defined
  4. Shadowing
  5. NO calcifications
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22
Q

What are major differences in SF between IDC and ILC?

A

IDC - mass like and has calcifications and a symptom is bloody nipple discharge

ILC - diffuse and no calcifications and “shrinking” of the breast

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23
Q

What are the four types of special-type invasive ductal carcinomas?

A
  1. Papillary
  2. Medullary
  3. Tubular
  4. Colloid
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24
Q

Patient symptoms of Medullary carcinoma?

A
  1. Palpable
  2. Mobile
  3. Soft
  4. Grows rapidly
  5. UOQ
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25
Q

SF of medullary carcinoma?

A
  1. Hypoechoic
  2. Well-circumscribed
  3. Lobulations
  4. Round
  5. Vascularity
  6. Central necrosis
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26
Q

In what population is medullary carcinoma most common?

A

Before age 50

27
Q

Colloid carcinoma is also known as?

A

Mucinous carcinoma

28
Q

In what population is colloid carcinoma most common?

A

Elderly women

29
Q

Is colloid carcinoma slow or fast growing?

A

SLOW growing

30
Q

SF of colloid carcinoma?

A
  1. Iso-/hypoechoic
  2. Well-circumscribd
  3. Lobulated
  4. Homogenous or mildly heterogenous
31
Q

What carcinoma has a higher incidence in men?

A

Papillary

32
Q

In what population of women is papillary carcinoma most common?

A

Elderly women

33
Q

What is the prominent patient symptom for papillary carcinoma?

A

Bloody nipple discharge

34
Q

SF of papillary carcinoma?

A
  1. Overlap of benign and malignant characteristics
  2. Prominent vascularity or vascular stalk
35
Q

Intra-cystic types of what cancer contain bloody fluid?

A

Papillary

36
Q

Common size for tubular carcinoma?

A

<2cm - slow growing

37
Q

Which carcinoma is also known as prominent reactive fibrosis?

A

Tubular carcinoma

38
Q

What type of carcinoma occurs when highly invasive CA infiltrates the lymphatics of the skin?

A

Inflammatory carcinoma

39
Q

What pathology shows signs of “orange peel appearance of the skin”?

A

Inflammatory carcinoma

40
Q

What can inflammatory carcinoma mimic?

A

Mastitis

41
Q

SF of inflammatory carcinoma?

A
  1. Edema/thickened skin
  2. Hypoechoic shadowing mass
  3. Spiculated
  4. Hypervascular SURROUNDING tissues
42
Q

What are the 3 routes for METS of the breast?

A
  1. Blood
  2. Lymphatics
  3. Direct extension
43
Q

Where is the first site of mets spread to with primary breast cancer?

A

Ipsi-lateral axillary lymph nodes - SLN

44
Q

What lymph node is at most risk of metastases?

A

Sentinel node (SN)

45
Q

What other organs are the most frequent for breast cancer to spread?

A
  1. Bone
  2. Liver
  3. Lung
  4. Brain
46
Q

What is the most common metastases site FROM the breast?

A

Axillary lymph node - Sentinel Node

47
Q

What is the most common and 2nd most common metastases site TO the breast?

A
  1. M/C = The contralateral breast
  2. 2nd M/C = melanoma
48
Q

SF of suspicious lymph nodes?

A
  1. Node enlargement
  2. Loss of fatty hilum
  3. Rounded shape
  4. Hypoechoic or heterogenous
49
Q

What is the normal size of a benign intra-mammary lymph node?

A

< or = 1cm

50
Q

What is the most common male breast abnormality?

A

Gynecomastia

51
Q

Cause of gynecomastia?

A

Abnormal estrogen to testosterone levels

52
Q

Gynecomastia vs. pseudo-gynecomastia?

A

Gynecomastia = proliferation of ductal tissues

Pseudo-gynecomastia = Fatty deposits WITHOUT tissue proliferation

53
Q

T or F? Pseudo-gynecomastia is a normal variant?

A

TRUE

54
Q

SF of gynecomastia

A
  1. Hypoechoic
  2. Triangular area beneath areola
55
Q

What is the most common primary breast cancer in men?

A

IDC

56
Q

Where is primary breast cancer in men usually located?

A

Beneath the areloa

57
Q

Male age of incidence of breast cancer?

A

Over 60 years

58
Q

What is male breast cancer strongly associated with? (2)

A
  1. Klinefelter syndrome
  2. Genetics
59
Q

Male patient symptoms of breast cancer?

A
  1. Bloody nipple discharge
  2. Nipple retraction or ulceration
  3. Hard and painless
  4. Palpable axillary nodes
60
Q

SF of male breast cancer?

A
  1. Hypoechoic
  2. Complex
  3. Well-circumscribed
  4. Irregular, spiculated
  5. Vascular
61
Q

Where do malignant breast masses most commonly originate from?

A

The ducts (TDLU)

62
Q

What stage (0-3) is DCIS considered to be?

A

Stage 0

63
Q

Paget disease is often initiated by underlying what?

A

DCIS within a main subareolar duct