ARDMS BREAST SONOGRAPHY EXAM 2024 NEWEST 2
VERSIONS (VERSION A AND VERSION B) COMPLETE 600
QUESTIONS AND CORRECT DETAILED ANSWERS
(ANSWERS) | A+
SECTION I: BREAST ANATOMY & PHYSIOLOGY (Questions 1–15)
1. The breast parenchyma is composed primarily of which tissue types?
A) Adipose and osseous tissue
B) Glandular and fibrous tissue
C) Cartilaginous and vascular tissue
D) Muscular and neural tissue
Correct Answer: B) Glandular and fibrous tissue
Rationale: The breast is composed of glandular tissue (lobules, ducts), fibrous
connective tissue (Cooper's ligaments), and adipose tissue. However, the
functional parenchyma—the milk-producing and transporting component—is
primarily glandular and fibrous tissue. Adipose tissue provides padding but is not
considered parenchyma. Osseous, cartilaginous, and muscular tissues are not
normal breast components.
2. The terminal ductal lobular unit (TDLU) is best described as:
A) The main lactiferous duct opening at the nipple
B) The functional milk-producing unit of the breast
C) The fibrous band supporting the breast
D) The vascular supply to the nipple-areolar complex
Correct Answer: B) The functional milk-producing unit of the breast
Rationale: The TDLU consists of the terminal duct and its associated lobules
(acini). It is the functional milk-producing unit and the site of origin for most
,breast pathologies, including fibroadenomas, cysts, and many carcinomas. The
lactiferous sinus is the dilated portion near the nipple, not the TDLU. Cooper's
ligaments are fibrous supports.
3. How many lobes typically comprise the mature female breast?
A) 4–6 lobes
B) 8–12 lobes
C) 15–20 lobes
D) 25–30 lobes
Correct Answer: C) 15–20 lobes
Rationale: The mature female breast typically contains 15–20 lobes, each
drained by a lactiferous duct that opens independently at the nipple. Each lobe is
subdivided into lobules, which contain the alveoli (acini) where milk is produced.
This ductal-lobular architecture is essential to understand when evaluating breast
pathology.
4. Which blood vessel provides the primary arterial supply to the breast?
A) Internal thoracic artery
B) Lateral thoracic artery
C) Posterior intercostal arteries
D) Thoracoacromial artery
Correct Answer: B) Lateral thoracic artery
Rationale: The breast receives blood supply from multiple sources, but the
lateral thoracic artery (a branch of the axillary artery) provides the primary supply
to the lateral breast. Additional supply comes from the internal thoracic artery
(medial), posterior intercostal arteries (lateral), and thoracoacromial artery.
Understanding vascular anatomy is important for surgical planning and
interpreting hypervascularity on ultrasound.
,5. The axillary tail of Spence refers to:
A) A normal extension of breast tissue into the axilla
B) A pathological lymph node cluster
C) A benign fatty tumor in the axilla
D) An accessory nipple along the milk line
Correct Answer: A) A normal extension of breast tissue into the axilla
Rationale: The axillary tail of Spence is a normal anatomical extension of
breast parenchyma that projects into the axilla through the foramen of Langer. It
is clinically significant because breast pathology (including carcinoma) can occur in
this region, and it must be included in the scanning protocol. It is not a
pathological finding.
6. Which hormone is primarily responsible for lobular development and milk
production?
A) Estrogen
B) Progesterone
C) Prolactin
D) Oxytocin
Correct Answer: C) Prolactin
Rationale: Prolactin, secreted by the anterior pituitary, stimulates milk
production (lactogenesis) in the alveoli. Estrogen promotes ductal proliferation,
progesterone promotes lobular development, and oxytocin causes milk ejection
(let-down) by contracting myoepithelial cells. Understanding hormonal influences
helps explain physiological breast changes across the menstrual cycle, pregnancy,
and lactation.
, 7. During which phase of the menstrual cycle is breast tenderness and
nodularity typically most pronounced?
A) Follicular phase
B) Ovulatory phase
C) Luteal phase
D) Menstrual phase
Correct Answer: C) Luteal phase
Rationale: The luteal phase (days 15–28) is characterized by elevated
progesterone and estrogen levels, leading to increased glandular proliferation,
stromal edema, and increased breast tenderness/nodularity. This is why breast
ultrasound is ideally performed during the follicular phase (days 5–12) when the
breast is least congested and most uniform, improving diagnostic accuracy.
8. Cooper's ligaments are responsible for:
A) Milk transport from lobules to ducts
B) Suspending and supporting the breast
C) Providing vascular supply to the nipple
D) Innervating the areolar complex
Correct Answer: B) Suspending and supporting the breast
Rationale: Cooper's ligaments (suspensory ligaments) are fibrous connective
tissue bands that extend from the pectoral fascia through the breast parenchyma
to attach to the dermis. They provide structural support and shape to the breast.
Their involvement by tumor can cause skin dimpling or retraction, a key clinical
and sonographic sign of malignancy.
9. The normal sonographic appearance of fibroglandular tissue is:
A) Homogeneous anechoic
B) Hyperechoic with hypoechoic ducts
VERSIONS (VERSION A AND VERSION B) COMPLETE 600
QUESTIONS AND CORRECT DETAILED ANSWERS
(ANSWERS) | A+
SECTION I: BREAST ANATOMY & PHYSIOLOGY (Questions 1–15)
1. The breast parenchyma is composed primarily of which tissue types?
A) Adipose and osseous tissue
B) Glandular and fibrous tissue
C) Cartilaginous and vascular tissue
D) Muscular and neural tissue
Correct Answer: B) Glandular and fibrous tissue
Rationale: The breast is composed of glandular tissue (lobules, ducts), fibrous
connective tissue (Cooper's ligaments), and adipose tissue. However, the
functional parenchyma—the milk-producing and transporting component—is
primarily glandular and fibrous tissue. Adipose tissue provides padding but is not
considered parenchyma. Osseous, cartilaginous, and muscular tissues are not
normal breast components.
2. The terminal ductal lobular unit (TDLU) is best described as:
A) The main lactiferous duct opening at the nipple
B) The functional milk-producing unit of the breast
C) The fibrous band supporting the breast
D) The vascular supply to the nipple-areolar complex
Correct Answer: B) The functional milk-producing unit of the breast
Rationale: The TDLU consists of the terminal duct and its associated lobules
(acini). It is the functional milk-producing unit and the site of origin for most
,breast pathologies, including fibroadenomas, cysts, and many carcinomas. The
lactiferous sinus is the dilated portion near the nipple, not the TDLU. Cooper's
ligaments are fibrous supports.
3. How many lobes typically comprise the mature female breast?
A) 4–6 lobes
B) 8–12 lobes
C) 15–20 lobes
D) 25–30 lobes
Correct Answer: C) 15–20 lobes
Rationale: The mature female breast typically contains 15–20 lobes, each
drained by a lactiferous duct that opens independently at the nipple. Each lobe is
subdivided into lobules, which contain the alveoli (acini) where milk is produced.
This ductal-lobular architecture is essential to understand when evaluating breast
pathology.
4. Which blood vessel provides the primary arterial supply to the breast?
A) Internal thoracic artery
B) Lateral thoracic artery
C) Posterior intercostal arteries
D) Thoracoacromial artery
Correct Answer: B) Lateral thoracic artery
Rationale: The breast receives blood supply from multiple sources, but the
lateral thoracic artery (a branch of the axillary artery) provides the primary supply
to the lateral breast. Additional supply comes from the internal thoracic artery
(medial), posterior intercostal arteries (lateral), and thoracoacromial artery.
Understanding vascular anatomy is important for surgical planning and
interpreting hypervascularity on ultrasound.
,5. The axillary tail of Spence refers to:
A) A normal extension of breast tissue into the axilla
B) A pathological lymph node cluster
C) A benign fatty tumor in the axilla
D) An accessory nipple along the milk line
Correct Answer: A) A normal extension of breast tissue into the axilla
Rationale: The axillary tail of Spence is a normal anatomical extension of
breast parenchyma that projects into the axilla through the foramen of Langer. It
is clinically significant because breast pathology (including carcinoma) can occur in
this region, and it must be included in the scanning protocol. It is not a
pathological finding.
6. Which hormone is primarily responsible for lobular development and milk
production?
A) Estrogen
B) Progesterone
C) Prolactin
D) Oxytocin
Correct Answer: C) Prolactin
Rationale: Prolactin, secreted by the anterior pituitary, stimulates milk
production (lactogenesis) in the alveoli. Estrogen promotes ductal proliferation,
progesterone promotes lobular development, and oxytocin causes milk ejection
(let-down) by contracting myoepithelial cells. Understanding hormonal influences
helps explain physiological breast changes across the menstrual cycle, pregnancy,
and lactation.
, 7. During which phase of the menstrual cycle is breast tenderness and
nodularity typically most pronounced?
A) Follicular phase
B) Ovulatory phase
C) Luteal phase
D) Menstrual phase
Correct Answer: C) Luteal phase
Rationale: The luteal phase (days 15–28) is characterized by elevated
progesterone and estrogen levels, leading to increased glandular proliferation,
stromal edema, and increased breast tenderness/nodularity. This is why breast
ultrasound is ideally performed during the follicular phase (days 5–12) when the
breast is least congested and most uniform, improving diagnostic accuracy.
8. Cooper's ligaments are responsible for:
A) Milk transport from lobules to ducts
B) Suspending and supporting the breast
C) Providing vascular supply to the nipple
D) Innervating the areolar complex
Correct Answer: B) Suspending and supporting the breast
Rationale: Cooper's ligaments (suspensory ligaments) are fibrous connective
tissue bands that extend from the pectoral fascia through the breast parenchyma
to attach to the dermis. They provide structural support and shape to the breast.
Their involvement by tumor can cause skin dimpling or retraction, a key clinical
and sonographic sign of malignancy.
9. The normal sonographic appearance of fibroglandular tissue is:
A) Homogeneous anechoic
B) Hyperechoic with hypoechoic ducts
