The Breast (BR)ination Exam
Question 1. Which embryonic layer gives rise to the mammary glands?
A) Endoderm
B) Mesoderm
C) Ectoderm
D) Neural crest
Answer: C
Explanation: The mammary glands develop from the ectoderm, specifically from the mammary ridge or
milk line.
Question 2. The majority of breast tissue drains lymphatically to which group of lymph nodes?
A) Internal mammary
B) Supraclavicular
C) Axillary
D) Infraclavicular
Answer: C
Explanation: About 75% of breast lymph drains to the axillary lymph nodes, making them most clinically
significant in breast cancer.
Question 3. Which hormone is primarily responsible for breast ductal development at puberty?
A) Progesterone
B) Estrogen
C) Prolactin
D) Testosterone
Answer: B
Explanation: Estrogen stimulates ductal proliferation and growth during puberty.
Question 4. What is the name of the ligamentous structures that provide support to the breast?
A) Pectoral ligaments
B) Cooper’s ligaments
C) Montgomery’s ligaments
D) Gerdy’s ligaments
Answer: B
Explanation: Cooper’s ligaments are connective tissue strands that help maintain structural integrity of
the breast.
Question 5. Which quadrant of the breast is the most common location for breast cancer?
A) Upper outer
B) Upper inner
C) Lower outer
D) Lower inner
Answer: A
Explanation: The upper outer quadrant has the most glandular tissue and is the most frequent site for
breast cancer.
Question 6. Which layer is immediately deep to the breast parenchyma?
A) Subcutaneous fat
B) Retromammary space
