Back-to-School September 2025/2026 | Clinical
Medicine High Yield Exam Prep | 300+ Verified
Practice Questions with Correct Answers & Detailed
Rationales | Comprehensive Study Guide on
Internal Medicine, Pathophysiology & Clinical
Decision-Making | Medical, Nursing & PA School
Preparation
1. A 65-year-old male presents with chest pain radiating to his left arm.
What is the most likely diagnosis?
A) Aortic dissection
B) Myocardial infarction
C) Pulmonary embolism
D) Gastroesophageal reflux disease
Answer: B - "Myocardial infarction."
Rationale: The classic presentation of a myocardial infarction (MI) includes chest pain
that may radiate to the left arm, jaw, or back. The patient's age and gender also place
him at higher risk for cardiovascular disease. Aortic dissection may present with severe,
tearing chest pain and often involves back pain. Pulmonary embolism typically presents
with pleuritic chest pain and dyspnea. Gastroesophageal reflux disease may cause chest
discomfort but usually does not present with radiation to the arm.
2. A patient presents with sudden onset of unilateral facial weakness.
What is the most appropriate next step in management?
A) MRI of the brain
B) Administer aspirin
C) Perform a CT scan of the head
D) Start intravenous antibiotics
Answer: C - "Perform a CT scan of the head."
Rationale: In a patient with sudden unilateral facial weakness, a CT scan is the best
initial diagnostic tool to rule out a hemorrhagic stroke, which is critical for determining
the appropriate treatment. MRI can provide more detailed images but typically takes
longer to perform. Administering aspirin may be appropriate after ruling out a
hemorrhagic stroke, and intravenous antibiotics are not indicated in this acute setting
without evidence of infection.
3. A 45-year-old female with a history of peptic ulcer disease presents with
hematemesis. What is the most likely cause?
A) Gastric cancer
, B) Esophageal varices
C) Stress ulcer
D) Drug-induced gastritis
Answer: A - "Gastric cancer."
Rationale: Hematemesis in a patient with a history of peptic ulcer disease raises
concern for gastric cancer, particularly if there are warning signs like weight loss or
changes in appetite. Esophageal varices typically cause hematemesis in patients with
liver disease due to portal hypertension. Stress ulcers can occur in critically ill patients
but are less common in those with a known history of ulcers. Drug-induced gastritis
usually presents with abdominal discomfort rather than significant hematemesis.
4. A 30-year-old male presents with acute onset of severe abdominal pain
and a "board-like" abdomen. What is the most likely diagnosis?
A) Acute pancreatitis
B) Perforated viscus
C) Appendicitis
D) Cholecystitis
Answer: B - "Perforated viscus."
Rationale: A "board-like" abdomen suggests peritoneal irritation, which commonly
occurs with perforation of a hollow organ, leading to peritonitis. Acute pancreatitis
typically presents with severe abdominal pain but usually does not cause a rigid
abdomen. Appendicitis can cause localized pain and tenderness but would not cause
such a generalized "board-like" abdomen. Cholecystitis may present with right upper
quadrant pain and tenderness but does not typically lead to a rigid abdomen unless
perforation occurs.
5. A patient with diabetes presents with a foot ulcer that is not healing.
What is the most important factor to consider in the management of this
patient?
A) Antibiotic therapy
B) Blood glucose control
C) Surgical debridement
D) Dressing changes
Answer: B - "Blood glucose control."
Rationale: Adequate blood glucose control is crucial for wound healing in diabetic
patients. Hyperglycemia can impair the immune response and slow down the healing
process. While antibiotics may be necessary if there is an infection, addressing blood
sugar levels is fundamental. Surgical debridement and dressing changes are important
but secondary to ensuring that blood glucose levels are within target ranges.
, 6. A 55-year-old female presents with sudden onset of shortness of breath
and chest pain after a long flight. What is the most likely diagnosis?
A) Pulmonary embolism
B) Pneumothorax
C) Acute myocardial infarction
D) Aortic dissection
Answer: A - "Pulmonary embolism."
Rationale: The history of recent long-haul travel combined with sudden shortness of
breath and chest pain is highly suggestive of a pulmonary embolism (PE), particularly in
a patient with risk factors like prolonged immobility. Pneumothorax may present
similarly but usually follows trauma or occurs spontaneously. Acute myocardial
infarction is less likely given the context, and aortic dissection typically presents with
severe, tearing chest pain that radiates to the back.
7. A patient with chronic kidney disease presents with fatigue, weakness,
and pallor. What laboratory finding is most likely?
A) Hyperkalemia
B) Anemia
C) Hyperphosphatemia
D) Metabolic acidosis
Answer: B - "Anemia."
Rationale: Anemia is common in patients with chronic kidney disease due to
decreased erythropoietin production by the kidneys. Other findings like hyperkalemia
and hyperphosphatemia can also occur, but the symptoms of fatigue and pallor are
more directly related to anemia. Metabolic acidosis may be present but is less likely to
be the primary cause of the patient's symptoms.
8. A patient presents with severe headache, photophobia, and neck
stiffness. What is the most appropriate initial diagnostic test?
A) MRI of the brain
B) CT scan of the head
C) Lumbar puncture
D) Blood cultures
Answer: B - "CT scan of the head."
Rationale: In a patient presenting with symptoms suggestive of meningitis, a CT scan is
performed first to rule out any intracranial hemorrhage or mass effect before proceeding
to a lumbar puncture. If the CT is clear, a lumbar puncture can then be performed to
analyze cerebrospinal fluid. MRI is not typically the first-line test in this scenario, and
blood cultures, while important, do not provide immediate diagnostic information.
, 9. A 70-year-old male presents with confusion, tremors, and a "mask-like"
face. What is the most likely diagnosis?
A) Alzheimer's disease
B) Parkinson's disease
C) Multiple sclerosis
D) Huntington's disease
Answer: B - "Parkinson's disease."
Rationale: The patient's symptoms, including confusion, tremors, and a "mask-like"
face (facial rigidity), are classic signs of Parkinson's disease, a neurodegenerative
disorder. Alzheimer's disease typically presents with memory loss rather than tremors,
while multiple sclerosis and Huntington's disease present with different sets of
symptoms.
10. A 50-year-old female presents with fatigue and a "butterfly" rash on her
face. What is the most likely diagnosis?
A) Rheumatoid arthritis
B) Systemic lupus erythematosus
C) Scleroderma
D) Psoriasis
Answer: B - "Systemic lupus erythematosus."
Rationale: The "butterfly" rash is characteristic of systemic lupus erythematosus (SLE),
an autoimmune condition that can cause a variety of systemic symptoms. Rheumatoid
arthritis primarily affects the joints, while scleroderma causes skin thickening and organ
involvement, and psoriasis typically presents as silvery plaques.
11. A patient presents with a new onset of joint pain, fever, and a rash.
What is the most appropriate initial test?
A) Complete blood count (CBC)
B) Erythrocyte sedimentation rate (ESR)
C) Antinuclear antibody (ANA)
D) Rheumatoid factor
Answer: C - "Antinuclear antibody (ANA)."
Rationale: Given the combination of joint pain, fever, and rash, an ANA test is
appropriate to screen for autoimmune diseases, including lupus and other connective
tissue disorders. While a CBC and ESR may provide useful information, the ANA is more
specific for autoimmune conditions.
12. A patient with a history of asthma presents with wheezing and difficulty
breathing after exposure to a known allergen. What is the best
immediate treatment?
Medicine High Yield Exam Prep | 300+ Verified
Practice Questions with Correct Answers & Detailed
Rationales | Comprehensive Study Guide on
Internal Medicine, Pathophysiology & Clinical
Decision-Making | Medical, Nursing & PA School
Preparation
1. A 65-year-old male presents with chest pain radiating to his left arm.
What is the most likely diagnosis?
A) Aortic dissection
B) Myocardial infarction
C) Pulmonary embolism
D) Gastroesophageal reflux disease
Answer: B - "Myocardial infarction."
Rationale: The classic presentation of a myocardial infarction (MI) includes chest pain
that may radiate to the left arm, jaw, or back. The patient's age and gender also place
him at higher risk for cardiovascular disease. Aortic dissection may present with severe,
tearing chest pain and often involves back pain. Pulmonary embolism typically presents
with pleuritic chest pain and dyspnea. Gastroesophageal reflux disease may cause chest
discomfort but usually does not present with radiation to the arm.
2. A patient presents with sudden onset of unilateral facial weakness.
What is the most appropriate next step in management?
A) MRI of the brain
B) Administer aspirin
C) Perform a CT scan of the head
D) Start intravenous antibiotics
Answer: C - "Perform a CT scan of the head."
Rationale: In a patient with sudden unilateral facial weakness, a CT scan is the best
initial diagnostic tool to rule out a hemorrhagic stroke, which is critical for determining
the appropriate treatment. MRI can provide more detailed images but typically takes
longer to perform. Administering aspirin may be appropriate after ruling out a
hemorrhagic stroke, and intravenous antibiotics are not indicated in this acute setting
without evidence of infection.
3. A 45-year-old female with a history of peptic ulcer disease presents with
hematemesis. What is the most likely cause?
A) Gastric cancer
, B) Esophageal varices
C) Stress ulcer
D) Drug-induced gastritis
Answer: A - "Gastric cancer."
Rationale: Hematemesis in a patient with a history of peptic ulcer disease raises
concern for gastric cancer, particularly if there are warning signs like weight loss or
changes in appetite. Esophageal varices typically cause hematemesis in patients with
liver disease due to portal hypertension. Stress ulcers can occur in critically ill patients
but are less common in those with a known history of ulcers. Drug-induced gastritis
usually presents with abdominal discomfort rather than significant hematemesis.
4. A 30-year-old male presents with acute onset of severe abdominal pain
and a "board-like" abdomen. What is the most likely diagnosis?
A) Acute pancreatitis
B) Perforated viscus
C) Appendicitis
D) Cholecystitis
Answer: B - "Perforated viscus."
Rationale: A "board-like" abdomen suggests peritoneal irritation, which commonly
occurs with perforation of a hollow organ, leading to peritonitis. Acute pancreatitis
typically presents with severe abdominal pain but usually does not cause a rigid
abdomen. Appendicitis can cause localized pain and tenderness but would not cause
such a generalized "board-like" abdomen. Cholecystitis may present with right upper
quadrant pain and tenderness but does not typically lead to a rigid abdomen unless
perforation occurs.
5. A patient with diabetes presents with a foot ulcer that is not healing.
What is the most important factor to consider in the management of this
patient?
A) Antibiotic therapy
B) Blood glucose control
C) Surgical debridement
D) Dressing changes
Answer: B - "Blood glucose control."
Rationale: Adequate blood glucose control is crucial for wound healing in diabetic
patients. Hyperglycemia can impair the immune response and slow down the healing
process. While antibiotics may be necessary if there is an infection, addressing blood
sugar levels is fundamental. Surgical debridement and dressing changes are important
but secondary to ensuring that blood glucose levels are within target ranges.
, 6. A 55-year-old female presents with sudden onset of shortness of breath
and chest pain after a long flight. What is the most likely diagnosis?
A) Pulmonary embolism
B) Pneumothorax
C) Acute myocardial infarction
D) Aortic dissection
Answer: A - "Pulmonary embolism."
Rationale: The history of recent long-haul travel combined with sudden shortness of
breath and chest pain is highly suggestive of a pulmonary embolism (PE), particularly in
a patient with risk factors like prolonged immobility. Pneumothorax may present
similarly but usually follows trauma or occurs spontaneously. Acute myocardial
infarction is less likely given the context, and aortic dissection typically presents with
severe, tearing chest pain that radiates to the back.
7. A patient with chronic kidney disease presents with fatigue, weakness,
and pallor. What laboratory finding is most likely?
A) Hyperkalemia
B) Anemia
C) Hyperphosphatemia
D) Metabolic acidosis
Answer: B - "Anemia."
Rationale: Anemia is common in patients with chronic kidney disease due to
decreased erythropoietin production by the kidneys. Other findings like hyperkalemia
and hyperphosphatemia can also occur, but the symptoms of fatigue and pallor are
more directly related to anemia. Metabolic acidosis may be present but is less likely to
be the primary cause of the patient's symptoms.
8. A patient presents with severe headache, photophobia, and neck
stiffness. What is the most appropriate initial diagnostic test?
A) MRI of the brain
B) CT scan of the head
C) Lumbar puncture
D) Blood cultures
Answer: B - "CT scan of the head."
Rationale: In a patient presenting with symptoms suggestive of meningitis, a CT scan is
performed first to rule out any intracranial hemorrhage or mass effect before proceeding
to a lumbar puncture. If the CT is clear, a lumbar puncture can then be performed to
analyze cerebrospinal fluid. MRI is not typically the first-line test in this scenario, and
blood cultures, while important, do not provide immediate diagnostic information.
, 9. A 70-year-old male presents with confusion, tremors, and a "mask-like"
face. What is the most likely diagnosis?
A) Alzheimer's disease
B) Parkinson's disease
C) Multiple sclerosis
D) Huntington's disease
Answer: B - "Parkinson's disease."
Rationale: The patient's symptoms, including confusion, tremors, and a "mask-like"
face (facial rigidity), are classic signs of Parkinson's disease, a neurodegenerative
disorder. Alzheimer's disease typically presents with memory loss rather than tremors,
while multiple sclerosis and Huntington's disease present with different sets of
symptoms.
10. A 50-year-old female presents with fatigue and a "butterfly" rash on her
face. What is the most likely diagnosis?
A) Rheumatoid arthritis
B) Systemic lupus erythematosus
C) Scleroderma
D) Psoriasis
Answer: B - "Systemic lupus erythematosus."
Rationale: The "butterfly" rash is characteristic of systemic lupus erythematosus (SLE),
an autoimmune condition that can cause a variety of systemic symptoms. Rheumatoid
arthritis primarily affects the joints, while scleroderma causes skin thickening and organ
involvement, and psoriasis typically presents as silvery plaques.
11. A patient presents with a new onset of joint pain, fever, and a rash.
What is the most appropriate initial test?
A) Complete blood count (CBC)
B) Erythrocyte sedimentation rate (ESR)
C) Antinuclear antibody (ANA)
D) Rheumatoid factor
Answer: C - "Antinuclear antibody (ANA)."
Rationale: Given the combination of joint pain, fever, and rash, an ANA test is
appropriate to screen for autoimmune diseases, including lupus and other connective
tissue disorders. While a CBC and ESR may provide useful information, the ANA is more
specific for autoimmune conditions.
12. A patient with a history of asthma presents with wheezing and difficulty
breathing after exposure to a known allergen. What is the best
immediate treatment?
