PATHOPHYSIOLOGY BLOCK 2 EXAM |
QUESTIONS, ANSWERS AND DETAILED
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,During the luteal phase of the menstrual cycle, the A) Increase in breast lobule size and stromal swelling
combination of estrogen and progesterone leads to which of
the following changes in breast tissue? Explanation: During the luteal phase, progesterone, along with estrogen, stimulates the
enlargement of breast lobules and swelling of the stromal tissue. This results in
A) Increase in breast lobule size and stromal swelling premenstrual breast enlargement, which reverses during the follicular phase.
B) Reduction in breast lobule size
C) Increased apoptosis of breast tissue
D) Decreased vascular supply to the breast
What happens to the breast lobules during pregnancy? C) They reach their maximum number and size (hyperplasia)
A) They undergo involution Explanation: During pregnancy, hormonal stimulation leads to significant proliferation of
B) They decrease in number but increase in stroma breast lobules to prepare for lactation. The number and size of lobules reach their peak,
C) They reach their maximum number and size while the stromal tissue decreases.
D) They remain unchanged due to the suppression of estrogen
and progesterone
What is the primary cause of the decrease in lobule size after B) Apoptosis of breast epithelial cells
pregnancy and lactation?
Explanation: Following pregnancy and lactation, the withdrawal of hormonal stimulation
A) Decreased estrogen levels leads to apoptosis (programmed cell death) of breast epithelial cells, resulting in a
B) Apoptosis of breast epithelial cells reduction in lobule size.
C) Increased stromal growth
D) Continued hormonal stimulation from prolactin
What change occurs in the breast tissue during menopause? C) Involution of TDLUs
A) Increased lobule size Explanation: Menopause leads to a decline in estrogen and progesterone levels, causing
B) Hyperplasia of terminal duct lobular units (TDLUs) the involution (shrinkage and degeneration) of terminal duct lobular units (TDLUs), which
C) Involution of TDLUs reduces the overall glandular tissue in the breast.
D) Increased progesterone-driven breast growth
,Which of the following best describes the sequence of breast B) Estrogen → Thelarche → Increased progesterone during the luteal phase →
changes over a woman's lifetime, starting with estrogen? Increased breast size → Pregnancy and lactation → Complete breast development →
Menopause and TDLU involution
A) Estrogen → Thelarche → Menopause → Pregnancy →
Lactation → Increased breast size → TDLU involution Explanation: The correct sequence begins with estrogen initiating thelarche (breast
B) Estrogen → Thelarche → Increased progesterone during development), followed by the increase in progesterone during the luteal phase which
the luteal phase → Increased breast size → Pregnancy and leads to increased breast size, then pregnancy and lactationwhich result in complete
lactation → Complete breast development → Menopause and breast development, and finally menopause, leading to TDLU involution.
TDLU involution
C) Estrogen → Pregnancy → Thelarche → Increased
progesterone → Lactation → TDLU involution
D) Estrogen → Thelarche → Increased estrogen and
progesterone → Pregnancy → Menopause → TDLU involution
Supernumerary nipples (polythelia) develop due to abnormal D) The mammary ridges (milk lines)
development along which anatomical structure?
Explanation: Supernumerary nipples arise from abnormal persistence of the mammary
A) Lymphatic drainage pathways ridges, which extend from the axilla to the inner thigh. These extra nipples may sometimes
B) The pectoralis major muscle be associated with additional breast tissue (polymastia) and can even develop breast
C) The axillary lymph nodes diseases, including cancer.
D) The mammary ridges
Polymastia is defined as: B) Extra breast tissue along the milk line
A) Male breast enlargement Explanation: Polymastia refers to the presence of extra breast tissue along the milk line,
B) Extra breast tissue along the milk line often in the form of accessory breast tissue.
C) Infection of the breast tissue with Staphylococcus aureus
D) A benign tumor of the breast
Which of the following is NOT a common risk factor for A) Increased testosterone levels
gynecomastia?
Explanation: Gynecomastia results from an imbalance between estrogen (increased) and
A) Increased testosterone levels testosterone (decreased). Factors that contribute to this imbalance include Klinefelter
B) Increased estrogen levels syndrome, liver disease, anabolic steroids, and medications such as spironolactone,
C) Klinefelter syndrome which has anti-androgenic effects. Increased testosterone levels, on the other hand,
D) Spironolactone use would counteract gynecomastia development.
, A 17-year-old male presents with a tender, button-like swelling C) Gynecomastia
beneath the areola. He is otherwise healthy. What is the most
likely explanation? Explanation: Gynecomastia often presents as a small, tender mass beneath the areola,
particularly in adolescent males during puberty due to temporary hormonal imbalances.
A) Breast cancer It is usually benign and resolves on its own.
B) Supernumerary nipple
C) Gynecomastia
D) Mastitis
Which of the following best describes the pathologic feature B) Ductal hyperplasia and connective tissue formation
of gynecomastia?
Explanation: Gynecomastia is characterized by an increase in ductal tissue and stromal
A) Lobular proliferation and fibrosis connective tissue due to an imbalance of estrogen and testosterone. Unlike female
B) Ductal hyperplasia and connective tissue formation breast tissue, lobules are generally absent in male gynecomastia.
C) Fat necrosis and inflammation
D) Increased lobule formation with secretory changes
A patient is found to have an extra nipple on physical exam, C) It may be associated with additional breast tissue and potential breast disease
initially mistaken for a mole. What is the clinical significance of
this finding? Explanation: Supernumerary nipples can sometimes be accompanied by accessory
breast tissue (polymastia), which is capable of undergoing the same pathologic changes
A) It has no clinical relevance and can be ignored as normal breast tissue, including cancer development.
B) It indicates a high risk of breast cancer
C) It may be associated with additional breast tissue and
potential breast disease
D) It signifies an underlying endocrine disorder
Which of the following is the most common cause of B) Staphylococcus aureus
lactational mastitis?
Explanation: Lactational mastitis is most commonly caused by Staphylococcus aureus,
A) Escherichia coli followed by streptococcal species. It occurs when bacteria enter through cracked
B) Staphylococcus aureus nipples, leading to infection, inflammation, and potentially an abscess.
C) Pseudomonas aeruginosa
D) Mycobacterium tuberculosis
QUESTIONS, ANSWERS AND DETAILED
RATIONALES | COMPLETE STUDY GUIDE
| GRADED A+ | GUARANTEED SUCCESS
Updated 2026 Questions and Answers
100% Verified Exam Prep
,During the luteal phase of the menstrual cycle, the A) Increase in breast lobule size and stromal swelling
combination of estrogen and progesterone leads to which of
the following changes in breast tissue? Explanation: During the luteal phase, progesterone, along with estrogen, stimulates the
enlargement of breast lobules and swelling of the stromal tissue. This results in
A) Increase in breast lobule size and stromal swelling premenstrual breast enlargement, which reverses during the follicular phase.
B) Reduction in breast lobule size
C) Increased apoptosis of breast tissue
D) Decreased vascular supply to the breast
What happens to the breast lobules during pregnancy? C) They reach their maximum number and size (hyperplasia)
A) They undergo involution Explanation: During pregnancy, hormonal stimulation leads to significant proliferation of
B) They decrease in number but increase in stroma breast lobules to prepare for lactation. The number and size of lobules reach their peak,
C) They reach their maximum number and size while the stromal tissue decreases.
D) They remain unchanged due to the suppression of estrogen
and progesterone
What is the primary cause of the decrease in lobule size after B) Apoptosis of breast epithelial cells
pregnancy and lactation?
Explanation: Following pregnancy and lactation, the withdrawal of hormonal stimulation
A) Decreased estrogen levels leads to apoptosis (programmed cell death) of breast epithelial cells, resulting in a
B) Apoptosis of breast epithelial cells reduction in lobule size.
C) Increased stromal growth
D) Continued hormonal stimulation from prolactin
What change occurs in the breast tissue during menopause? C) Involution of TDLUs
A) Increased lobule size Explanation: Menopause leads to a decline in estrogen and progesterone levels, causing
B) Hyperplasia of terminal duct lobular units (TDLUs) the involution (shrinkage and degeneration) of terminal duct lobular units (TDLUs), which
C) Involution of TDLUs reduces the overall glandular tissue in the breast.
D) Increased progesterone-driven breast growth
,Which of the following best describes the sequence of breast B) Estrogen → Thelarche → Increased progesterone during the luteal phase →
changes over a woman's lifetime, starting with estrogen? Increased breast size → Pregnancy and lactation → Complete breast development →
Menopause and TDLU involution
A) Estrogen → Thelarche → Menopause → Pregnancy →
Lactation → Increased breast size → TDLU involution Explanation: The correct sequence begins with estrogen initiating thelarche (breast
B) Estrogen → Thelarche → Increased progesterone during development), followed by the increase in progesterone during the luteal phase which
the luteal phase → Increased breast size → Pregnancy and leads to increased breast size, then pregnancy and lactationwhich result in complete
lactation → Complete breast development → Menopause and breast development, and finally menopause, leading to TDLU involution.
TDLU involution
C) Estrogen → Pregnancy → Thelarche → Increased
progesterone → Lactation → TDLU involution
D) Estrogen → Thelarche → Increased estrogen and
progesterone → Pregnancy → Menopause → TDLU involution
Supernumerary nipples (polythelia) develop due to abnormal D) The mammary ridges (milk lines)
development along which anatomical structure?
Explanation: Supernumerary nipples arise from abnormal persistence of the mammary
A) Lymphatic drainage pathways ridges, which extend from the axilla to the inner thigh. These extra nipples may sometimes
B) The pectoralis major muscle be associated with additional breast tissue (polymastia) and can even develop breast
C) The axillary lymph nodes diseases, including cancer.
D) The mammary ridges
Polymastia is defined as: B) Extra breast tissue along the milk line
A) Male breast enlargement Explanation: Polymastia refers to the presence of extra breast tissue along the milk line,
B) Extra breast tissue along the milk line often in the form of accessory breast tissue.
C) Infection of the breast tissue with Staphylococcus aureus
D) A benign tumor of the breast
Which of the following is NOT a common risk factor for A) Increased testosterone levels
gynecomastia?
Explanation: Gynecomastia results from an imbalance between estrogen (increased) and
A) Increased testosterone levels testosterone (decreased). Factors that contribute to this imbalance include Klinefelter
B) Increased estrogen levels syndrome, liver disease, anabolic steroids, and medications such as spironolactone,
C) Klinefelter syndrome which has anti-androgenic effects. Increased testosterone levels, on the other hand,
D) Spironolactone use would counteract gynecomastia development.
, A 17-year-old male presents with a tender, button-like swelling C) Gynecomastia
beneath the areola. He is otherwise healthy. What is the most
likely explanation? Explanation: Gynecomastia often presents as a small, tender mass beneath the areola,
particularly in adolescent males during puberty due to temporary hormonal imbalances.
A) Breast cancer It is usually benign and resolves on its own.
B) Supernumerary nipple
C) Gynecomastia
D) Mastitis
Which of the following best describes the pathologic feature B) Ductal hyperplasia and connective tissue formation
of gynecomastia?
Explanation: Gynecomastia is characterized by an increase in ductal tissue and stromal
A) Lobular proliferation and fibrosis connective tissue due to an imbalance of estrogen and testosterone. Unlike female
B) Ductal hyperplasia and connective tissue formation breast tissue, lobules are generally absent in male gynecomastia.
C) Fat necrosis and inflammation
D) Increased lobule formation with secretory changes
A patient is found to have an extra nipple on physical exam, C) It may be associated with additional breast tissue and potential breast disease
initially mistaken for a mole. What is the clinical significance of
this finding? Explanation: Supernumerary nipples can sometimes be accompanied by accessory
breast tissue (polymastia), which is capable of undergoing the same pathologic changes
A) It has no clinical relevance and can be ignored as normal breast tissue, including cancer development.
B) It indicates a high risk of breast cancer
C) It may be associated with additional breast tissue and
potential breast disease
D) It signifies an underlying endocrine disorder
Which of the following is the most common cause of B) Staphylococcus aureus
lactational mastitis?
Explanation: Lactational mastitis is most commonly caused by Staphylococcus aureus,
A) Escherichia coli followed by streptococcal species. It occurs when bacteria enter through cracked
B) Staphylococcus aureus nipples, leading to infection, inflammation, and potentially an abscess.
C) Pseudomonas aeruginosa
D) Mycobacterium tuberculosis
