2026/2027 Pathophysiology Board Exam
Prep: 106 Multiple-Choice Questions &
Answers on Hematology, Thyroid,
Hypertension, Diabetes, Neurology, and
Pharmacology
Description:
Master pernicious anemia, Parkinson's disease, thyroid disorders, hypertension staging,
diabetes management, and SSRI pharmacology with this comprehensive 2026/2027
examination.
Features 106 board-style questions with detailed explanations, clinical scenarios, and
evidence-based answers. Perfect for USMLE, NP, PA, and medical school finals.
Download the complete 2026/2027 exam paper now and pass with confidence.
, 2026/2027 Med-PATHO Exam: 106 Q&A
Section 1: Hematologic Disorders – Macrocytic Anemias
Question 1
Which of the following best describes the primary pathophysiological mechanism underlying
pernicious anemia?
A. Folate deficiency due to poor dietary intake
B. Chronic blood loss leading to iron depletion
C. Lack of intrinsic factor resulting in decreased vitamin B12 absorption
D. Autoimmune destruction of transferrin receptors
Answer: C
Explanation: Pernicious anemia is specifically caused by the absence of intrinsic factor, a
glycoprotein produced by gastric parietal cells that is essential for intestinal absorption of
dietary vitamin B12. Without intrinsic factor, B12 cannot be absorbed regardless of adequate
dietary intake, leading to a macrocytic anemia.
Question 2
A 58-year-old female presents with fatigue, a smooth erythematous tongue, and reports
tingling sensations in both feet. Which additional finding would most strongly support a
diagnosis of pernicious anemia?
A. Spoon-shaped fingernails
B. Paresthesias of the hands
C. Angular cheilitis
D. Hemoglobin of 9.5 g/dL with microcytosis
Answer: B
Explanation: The classic triad of pernicious anemia symptoms includes a beefy red tongue
(glossitis), fatigue, and paresthesias of the hands and feet. The paresthesias result from
subacute combined degeneration of the spinal cord due to vitamin B12 deficiency affecting
myelin synthesis.
,Question 3
A patient is diagnosed with a macrocytic anemia. Laboratory studies reveal an elevated serum
homocysteine but normal methylmalonic acid. Which condition is most consistent with this
pattern?
A. Pernicious anemia
B. Folate deficiency anemia
C. Liver disease
D. Myelodysplastic syndrome
Answer: B
Explanation: Folate deficiency causes elevated homocysteine but normal methylmalonic
acid, whereas vitamin B12 deficiency elevates both markers. This distinction is clinically
useful because methylmalonic acid is specifically dependent on B12 as a cofactor, while
homocysteine metabolism requires both B12 and folate.
Question 4
Which of the following causes of macrocytic anemia is characterized by a mean corpuscular
volume (MCV) greater than 103 fL?
A. Iron deficiency anemia
B. Anemia of chronic disease
C. Folate deficiency anemia
D. Sickle cell anemia
Answer: C
Explanation: Folate deficiency typically produces MCV values exceeding 103 fL. While
other macrocytic anemias also show elevated MCV, folate deficiency often demonstrates the
most pronounced macrocytosis. The threshold for macrocytosis is generally MCV greater
than 100 fL, but values above 103 fL strongly suggest a nutritional deficiency cause.
Question 5
A 47-year-old patient with a history of gastric bypass surgery two years ago now presents
with fatigue and memory difficulties. Laboratory evaluation reveals macrocytic anemia. What
is the most likely underlying mechanism?
A. Folate malabsorption due to surgical rerouting
B. Iron deficiency from decreased dietary intake
C. Chronic blood loss from marginal ulcers
, D. Loss of intrinsic factor-producing cells
Answer: D
Explanation: Gastrectomy or gastric bypass surgery removes or bypasses the gastric fundus
and body, where parietal cells produce intrinsic factor. Without intrinsic factor, vitamin B12
cannot be absorbed in the terminal ileum. This typically manifests 1-5 years post-surgery as
B12 stores become depleted.
Question 6
A patient with chronic alcoholism presents with macrocytic anemia. Which of the following
is the most likely contributing mechanism?
A. Direct alcohol-induced bone marrow suppression
B. Concurrent folate deficiency from poor nutrition and impaired absorption
C. Autoimmune destruction of gastric parietal cells
D. Chronic liver disease causing spur cell anemia
Answer: B
Explanation: Alcoholism commonly leads to macrocytic anemia through folate deficiency,
which results from poor dietary intake, impaired intestinal absorption, and increased urinary
excretion. Additionally, alcohol directly interferes with folate metabolism in the liver. Liver
disease alone typically produces a normocytic or mildly macrocytic picture.
Section 2: Hematologic Disorders – Microcytic Anemias
Question 7
A 32-year-old woman reports fatigue, pale conjunctiva, and heavy menstrual bleeding lasting
8 days per cycle. Her complete blood count shows hemoglobin 9.2 g/dL and MCV 74 fL.
Which diagnosis is most likely?
A. Thalassemia minor
B. Anemia of chronic disease
C. Iron deficiency anemia
D. Sideroblastic anemia
Answer: C
Explanation: The presentation of menorrhagia as a source of chronic blood loss, combined
with microcytic anemia (MCV <87 fL), is classic for iron deficiency anemia. The normal
threshold for microcytosis is MCV less than 80 fL, though many sources use 87 fL as the
Prep: 106 Multiple-Choice Questions &
Answers on Hematology, Thyroid,
Hypertension, Diabetes, Neurology, and
Pharmacology
Description:
Master pernicious anemia, Parkinson's disease, thyroid disorders, hypertension staging,
diabetes management, and SSRI pharmacology with this comprehensive 2026/2027
examination.
Features 106 board-style questions with detailed explanations, clinical scenarios, and
evidence-based answers. Perfect for USMLE, NP, PA, and medical school finals.
Download the complete 2026/2027 exam paper now and pass with confidence.
, 2026/2027 Med-PATHO Exam: 106 Q&A
Section 1: Hematologic Disorders – Macrocytic Anemias
Question 1
Which of the following best describes the primary pathophysiological mechanism underlying
pernicious anemia?
A. Folate deficiency due to poor dietary intake
B. Chronic blood loss leading to iron depletion
C. Lack of intrinsic factor resulting in decreased vitamin B12 absorption
D. Autoimmune destruction of transferrin receptors
Answer: C
Explanation: Pernicious anemia is specifically caused by the absence of intrinsic factor, a
glycoprotein produced by gastric parietal cells that is essential for intestinal absorption of
dietary vitamin B12. Without intrinsic factor, B12 cannot be absorbed regardless of adequate
dietary intake, leading to a macrocytic anemia.
Question 2
A 58-year-old female presents with fatigue, a smooth erythematous tongue, and reports
tingling sensations in both feet. Which additional finding would most strongly support a
diagnosis of pernicious anemia?
A. Spoon-shaped fingernails
B. Paresthesias of the hands
C. Angular cheilitis
D. Hemoglobin of 9.5 g/dL with microcytosis
Answer: B
Explanation: The classic triad of pernicious anemia symptoms includes a beefy red tongue
(glossitis), fatigue, and paresthesias of the hands and feet. The paresthesias result from
subacute combined degeneration of the spinal cord due to vitamin B12 deficiency affecting
myelin synthesis.
,Question 3
A patient is diagnosed with a macrocytic anemia. Laboratory studies reveal an elevated serum
homocysteine but normal methylmalonic acid. Which condition is most consistent with this
pattern?
A. Pernicious anemia
B. Folate deficiency anemia
C. Liver disease
D. Myelodysplastic syndrome
Answer: B
Explanation: Folate deficiency causes elevated homocysteine but normal methylmalonic
acid, whereas vitamin B12 deficiency elevates both markers. This distinction is clinically
useful because methylmalonic acid is specifically dependent on B12 as a cofactor, while
homocysteine metabolism requires both B12 and folate.
Question 4
Which of the following causes of macrocytic anemia is characterized by a mean corpuscular
volume (MCV) greater than 103 fL?
A. Iron deficiency anemia
B. Anemia of chronic disease
C. Folate deficiency anemia
D. Sickle cell anemia
Answer: C
Explanation: Folate deficiency typically produces MCV values exceeding 103 fL. While
other macrocytic anemias also show elevated MCV, folate deficiency often demonstrates the
most pronounced macrocytosis. The threshold for macrocytosis is generally MCV greater
than 100 fL, but values above 103 fL strongly suggest a nutritional deficiency cause.
Question 5
A 47-year-old patient with a history of gastric bypass surgery two years ago now presents
with fatigue and memory difficulties. Laboratory evaluation reveals macrocytic anemia. What
is the most likely underlying mechanism?
A. Folate malabsorption due to surgical rerouting
B. Iron deficiency from decreased dietary intake
C. Chronic blood loss from marginal ulcers
, D. Loss of intrinsic factor-producing cells
Answer: D
Explanation: Gastrectomy or gastric bypass surgery removes or bypasses the gastric fundus
and body, where parietal cells produce intrinsic factor. Without intrinsic factor, vitamin B12
cannot be absorbed in the terminal ileum. This typically manifests 1-5 years post-surgery as
B12 stores become depleted.
Question 6
A patient with chronic alcoholism presents with macrocytic anemia. Which of the following
is the most likely contributing mechanism?
A. Direct alcohol-induced bone marrow suppression
B. Concurrent folate deficiency from poor nutrition and impaired absorption
C. Autoimmune destruction of gastric parietal cells
D. Chronic liver disease causing spur cell anemia
Answer: B
Explanation: Alcoholism commonly leads to macrocytic anemia through folate deficiency,
which results from poor dietary intake, impaired intestinal absorption, and increased urinary
excretion. Additionally, alcohol directly interferes with folate metabolism in the liver. Liver
disease alone typically produces a normocytic or mildly macrocytic picture.
Section 2: Hematologic Disorders – Microcytic Anemias
Question 7
A 32-year-old woman reports fatigue, pale conjunctiva, and heavy menstrual bleeding lasting
8 days per cycle. Her complete blood count shows hemoglobin 9.2 g/dL and MCV 74 fL.
Which diagnosis is most likely?
A. Thalassemia minor
B. Anemia of chronic disease
C. Iron deficiency anemia
D. Sideroblastic anemia
Answer: C
Explanation: The presentation of menorrhagia as a source of chronic blood loss, combined
with microcytic anemia (MCV <87 fL), is classic for iron deficiency anemia. The normal
threshold for microcytosis is MCV less than 80 fL, though many sources use 87 fL as the
