ARDMS Breast (BR) Registry actual Exam 2026/2027 |
Complete Practice Questions, Correct Answers & Detailed
Rationales
DOMAIN 1: ANATOMY AND PHYSIOLOGY
1.
Which structure is considered the functional unit most closely associated with the
development of many breast carcinomas?
A. Cooper ligament
B. Terminal duct lobular unit
C. Pectoralis major muscle
D. Retromammary fat
Correct Answer: B. Terminal duct lobular unit
Rationale: The terminal duct lobular unit (TDLU) consists of terminal ducts and
lobular acini and is the primary site for many epithelial breast abnormalities.
2.
Which breast layer lies immediately superficial to the pectoralis major muscle?
A. Skin
B. Subcutaneous fat
C. Retromammary space
D. Fibroglandular tissue
Correct Answer: C. Retromammary space
Rationale: The retromammary space separates the posterior breast tissue from
the pectoralis major fascia and permits mobility of the breast.
3.
The breast is primarily composed of which three major tissue components?
,A. Bone, cartilage, and muscle
B. Skin, glandular tissue, and bone
C. Glandular, fibrous, and fatty tissue
D. Muscle, vascular, and neural tissue
Correct Answer: C. Glandular, fibrous, and fatty tissue
Rationale: Normal breast tissue contains varying proportions of glandular tissue,
fibrous stroma, and adipose tissue.
4.
Which ligament provides internal structural support to the breast?
A. Inguinal ligament
B. Cooper ligament
C. Falciform ligament
D. Suspensory ligament of the ovary
Correct Answer: B. Cooper ligament
Rationale: Cooper ligaments are fibrous connective-tissue septa that extend
through the breast and help support its architecture.
5.
Which breast quadrant contains the greatest volume of breast tissue?
A. Upper inner
B. Lower inner
C. Upper outer
D. Lower outer
Correct Answer: C. Upper outer
Rationale: The upper outer quadrant generally contains the greatest amount of
glandular tissue and includes the axillary tail.
6.
The axillary tail of Spence represents:
,A. Extension of breast tissue toward the axilla
B. Extension of the pectoralis muscle
C. A lymphatic vessel
D. A vascular branch of the internal mammary artery
Correct Answer: A. Extension of breast tissue toward the axilla
Rationale: The axillary tail is an extension of normal breast tissue into the axilla.
7.
Which lymph-node group is most directly associated with drainage from the
breast's lateral regions?
A. Axillary nodes
B. Inguinal nodes
C. Popliteal nodes
D. Mesenteric nodes
Correct Answer: A. Axillary nodes
Rationale: Much of the breast, particularly lateral portions, drains toward axillary
lymph nodes.
8.
A normal axillary lymph node most commonly demonstrates which sonographic
appearance?
A. Round shape with absent hilum
B. Oval shape with echogenic fatty hilum
C. Irregular mass with microcalcifications
D. Completely anechoic center
Correct Answer: B. Oval shape with echogenic fatty hilum
Rationale: Normal lymph nodes are usually oval or reniform with a preserved
echogenic fatty hilum and thin cortex.
9.
Which sonographic lymph-node feature is most suspicious for malignancy?
, A. Thin cortex
B. Preserved fatty hilum
C. Cortical thickening with hilar displacement or loss
D. Oval morphology
Correct Answer: C. Cortical thickening with hilar displacement or loss
Rationale: Focal or diffuse cortical thickening, particularly with loss or
displacement of the fatty hilum, increases suspicion.
10.
Which hormonal state generally produces increased glandular breast tissue?
A. Pregnancy
B. Severe dehydration
C. Early childhood
D. Postmenopausal hypoestrogenism
Correct Answer: A. Pregnancy
Rationale: Pregnancy stimulates ductal and lobular proliferation, increasing
glandular tissue.
11.
During lactation, the breast typically becomes:
A. Predominantly fatty
B. More echogenic and heterogeneous from glandular proliferation
C. Completely anechoic
D. Atrophic
Correct Answer: B. More echogenic and heterogeneous from glandular
proliferation
Rationale: Lactational changes increase glandular tissue and vascularity and may
alter normal echogenicity.
12.
After menopause, breast tissue commonly undergoes:
Complete Practice Questions, Correct Answers & Detailed
Rationales
DOMAIN 1: ANATOMY AND PHYSIOLOGY
1.
Which structure is considered the functional unit most closely associated with the
development of many breast carcinomas?
A. Cooper ligament
B. Terminal duct lobular unit
C. Pectoralis major muscle
D. Retromammary fat
Correct Answer: B. Terminal duct lobular unit
Rationale: The terminal duct lobular unit (TDLU) consists of terminal ducts and
lobular acini and is the primary site for many epithelial breast abnormalities.
2.
Which breast layer lies immediately superficial to the pectoralis major muscle?
A. Skin
B. Subcutaneous fat
C. Retromammary space
D. Fibroglandular tissue
Correct Answer: C. Retromammary space
Rationale: The retromammary space separates the posterior breast tissue from
the pectoralis major fascia and permits mobility of the breast.
3.
The breast is primarily composed of which three major tissue components?
,A. Bone, cartilage, and muscle
B. Skin, glandular tissue, and bone
C. Glandular, fibrous, and fatty tissue
D. Muscle, vascular, and neural tissue
Correct Answer: C. Glandular, fibrous, and fatty tissue
Rationale: Normal breast tissue contains varying proportions of glandular tissue,
fibrous stroma, and adipose tissue.
4.
Which ligament provides internal structural support to the breast?
A. Inguinal ligament
B. Cooper ligament
C. Falciform ligament
D. Suspensory ligament of the ovary
Correct Answer: B. Cooper ligament
Rationale: Cooper ligaments are fibrous connective-tissue septa that extend
through the breast and help support its architecture.
5.
Which breast quadrant contains the greatest volume of breast tissue?
A. Upper inner
B. Lower inner
C. Upper outer
D. Lower outer
Correct Answer: C. Upper outer
Rationale: The upper outer quadrant generally contains the greatest amount of
glandular tissue and includes the axillary tail.
6.
The axillary tail of Spence represents:
,A. Extension of breast tissue toward the axilla
B. Extension of the pectoralis muscle
C. A lymphatic vessel
D. A vascular branch of the internal mammary artery
Correct Answer: A. Extension of breast tissue toward the axilla
Rationale: The axillary tail is an extension of normal breast tissue into the axilla.
7.
Which lymph-node group is most directly associated with drainage from the
breast's lateral regions?
A. Axillary nodes
B. Inguinal nodes
C. Popliteal nodes
D. Mesenteric nodes
Correct Answer: A. Axillary nodes
Rationale: Much of the breast, particularly lateral portions, drains toward axillary
lymph nodes.
8.
A normal axillary lymph node most commonly demonstrates which sonographic
appearance?
A. Round shape with absent hilum
B. Oval shape with echogenic fatty hilum
C. Irregular mass with microcalcifications
D. Completely anechoic center
Correct Answer: B. Oval shape with echogenic fatty hilum
Rationale: Normal lymph nodes are usually oval or reniform with a preserved
echogenic fatty hilum and thin cortex.
9.
Which sonographic lymph-node feature is most suspicious for malignancy?
, A. Thin cortex
B. Preserved fatty hilum
C. Cortical thickening with hilar displacement or loss
D. Oval morphology
Correct Answer: C. Cortical thickening with hilar displacement or loss
Rationale: Focal or diffuse cortical thickening, particularly with loss or
displacement of the fatty hilum, increases suspicion.
10.
Which hormonal state generally produces increased glandular breast tissue?
A. Pregnancy
B. Severe dehydration
C. Early childhood
D. Postmenopausal hypoestrogenism
Correct Answer: A. Pregnancy
Rationale: Pregnancy stimulates ductal and lobular proliferation, increasing
glandular tissue.
11.
During lactation, the breast typically becomes:
A. Predominantly fatty
B. More echogenic and heterogeneous from glandular proliferation
C. Completely anechoic
D. Atrophic
Correct Answer: B. More echogenic and heterogeneous from glandular
proliferation
Rationale: Lactational changes increase glandular tissue and vascularity and may
alter normal echogenicity.
12.
After menopause, breast tissue commonly undergoes:
