APEA 3P | Comprehensive Study Guide, Practice
Exam, Exam Questions & Answers, Exam Prep Test
Bank, Advanced Pathophysiology, Advanced
Pharmacology, Advanced Physical Assessment,
Differential Diagnosis, Clinical Decision-Making,
Diagnostic Reasoning, Patient Assessment, Evidence-
Based Practice, Detailed Rationales, Nurse
Practitioner Exam Review
Question 1: A 68-year-old male presents with a one-week history of
progressive weakness in his lower extremities, now requiring a cane for
ambulation. He reports no pain but has noticed urinary urgency and mild
constipation. Deep tendon reflexes are brisk in the lower extremities, and a
Babinski sign is present bilaterally. Which of the following is the most likely
diagnosis?
A. Peripheral neuropathy
B. Lumbar spinal stenosis
C. Multiple sclerosis
D. Cervical spondylotic myelopathy
CORRECT ANSWER: D. Cervical spondylotic myelopathy
Rationale:Cervical spondylotic myelopathy (CSM) presents with progressive, painless
weakness and spasticity in the lower extremities (myelopathic gait), often accompanied
by hyperreflexia and extensor plantar responses. Bladder and bowel dysfunction
(urgency/incontinence) can occur. Lumbar stenosis typically causes neurogenic
claudication (pain with walking) and lower motor neuron findings (hyporeflexia) if
severe. Peripheral neuropathy causes distal, symmetric sensory loss and weakness with
diminished reflexes. Multiple sclerosis typically has a relapsing-remitting course and
younger age of onset.
Question 2: A 55-year-old woman with a history of hypertension presents with
acute onset of the worst headache of her life, described as a "thunderclap." On
examination, she is nauseated and has nuchal rigidity. A non-contrast head CT
is negative. What is the most appropriate next step in management?
A. Discharge home with analgesics
B. Lumbar puncture
C. MRI of the brain with contrast
D. CT angiography of the head
CORRECT ANSWER: B. Lumbar puncture
Rationale:The clinical presentation is classic for subarachnoid hemorrhage (SAH).
When a non-contrast head CT is negative (approximately 5-10% of SAH cases,
especially if performed >6 hours after onset), a lumbar puncture is the gold standard to
detect xanthochromia and red blood cells, confirming the diagnosis. CT angiography is
,used to identify the aneurysm after the diagnosis is confirmed. MRI is not the next step.
Discharge is inappropriate without further workup.
Question 3: A 72-year-old male with diabetes and hypertension presents with
a painful, red, swollen left great toe. He denies any trauma. Laboratory tests
reveal an elevated serum uric acid level of 9.2 mg/dL. Joint aspiration reveals
needle-shaped, negatively birefringent crystals under polarized light. What is
the most appropriate initial pharmacologic treatment for the acute flare?
A. Allopurinol
B. Febuxostat
C. Colchicine
D. Probenecid
CORRECT ANSWER: C. Colchicine
Rationale:The acute flare of gout is treated with anti-inflammatory agents: NSAIDs,
colchicine, or corticosteroids. Colchicine is appropriate if started early. Allopurinol and
febuxostat are xanthine oxidase inhibitors used for chronic urate-lowering therapy and
should not be initiated during an acute flare. Probenecid is a uricosuric agent used for
chronic management.
Question 4: A 45-year-old female presents with progressive exertional dyspnea
and a dry cough. She reports a history of rheumatoid arthritis. Physical exam
reveals fine inspiratory crackles at the lung bases. High-resolution CT shows
bilateral reticular opacities and honeycombing. What is the most likely
diagnosis?
A. Pulmonary fibrosis (Usual Interstitial Pneumonia)
B. Pulmonary nodules
C. Pleural effusion
D. Bronchiectasis
CORRECT ANSWER: A. Pulmonary fibrosis (Usual Interstitial Pneumonia)
Rationale:The combination of RA, progressive dyspnea, fine crackles, and HRCT
showing reticular opacities and honeycombing in the lung bases is classic for interstitial
lung disease, specifically Usual Interstitial Pneumonia (UIP)/pulmonary fibrosis.
Rheumatoid arthritis is the most common autoimmune condition associated with ILD.
Nodules, effusions, and bronchiectasis are less consistent with this presentation.
Question 5: A 28-year-old male presents with palpitations, sweating, and
headache. His blood pressure is 180/110 mmHg and heart rate is 110 bpm.
These episodes occur paroxysmally and are associated with a feeling of panic.
Which of the following is the most likely diagnosis?
A. Hyperthyroidism
B. Pheochromocytoma
,C. Cushing's syndrome
D. Anxiety disorder
CORRECT ANSWER: B. Pheochromocytoma
Rationale:Pheochromocytoma presents with the classic triad of episodic headache,
sweating, and palpitations (tachycardia) in the context of severe, labile hypertension.
Hyperthyroidism would cause persistent symptoms. Cushing's syndrome features weight
gain and hypertension, but is less acutely paroxysmal. Anxiety disorder is a diagnosis of
exclusion after medical causes are ruled out.
Question 6: A 60-year-old patient with a history of chronic obstructive
pulmonary disease (COPD) presents with increasing dyspnea and productive
cough. He is on home oxygen. Arterial blood gas on 2 L/min nasal cannula
shows: pH 7.31, PaCO2 65 mmHg, PaO2 55 mmHg, HCO3- 32 mEq/L. How
should the oxygen therapy be adjusted?
A. Maintain current oxygen therapy
B. Increase oxygen to 4 L/min
C. Decrease oxygen to 1 L/min
D. Discontinue oxygen
CORRECT ANSWER: A. Maintain current oxygen therapy
Rationale:This patient has a chronic respiratory acidosis (high PaCO2 and bicarb) from
COPD. The PaO2 is below the target of 60 mmHg; therefore, oxygen should be
continued. Increasing oxygen to 4 L/min can lead to hypercapnia and respiratory
depression by reducing hypoxic drive. Decreasing oxygen is inappropriate. Oxygen
should not be discontinued as it is necessary for tissue oxygenation.
Question 7: A 34-year-old female presents with a 3-month history of fatigue,
joint pain, and a facial rash that worsens with sun exposure. Laboratory tests
reveal ANA positive, anti-dsDNA positive, and low complement levels. Which
of the following is the most appropriate initial therapy for her articular
symptoms?
A. Hydroxychloroquine
B. Prednisone
C. Methotrexate
D. Cyclophosphamide
CORRECT ANSWER: A. Hydroxychloroquine
Rationale:The patient has Systemic Lupus Erythematosus (SLE) based on the positive
ANA and anti-dsDNA, malar rash, and arthritis. Hydroxychloroquine is the standard
initial treatment for mild-to-moderate SLE manifestations, including arthritis and skin
disease. Prednisone is used for more severe organ-threatening disease. Methotrexate
and cyclophosphamide are reserved for refractory or severe cases.
, Question 8: A 72-year-old male presents with a painless, palpable mass in the
right lower quadrant of his abdomen. He reports no change in bowel habits.
On examination, a firm, non-tender, pulsatile mass is palpated. A bruit is
heard on auscultation. What is the most appropriate next step in
management?
A. Ultrasound of the abdomen
B. CT angiography of the abdomen
C. MRI of the abdomen
D. Plain abdominal X-ray
CORRECT ANSWER: A. Ultrasound of the abdomen
Rationale:This presentation is classic for an abdominal aortic aneurysm (AAA) - a
painless, pulsatile mass with a bruit. The most appropriate initial imaging is an
abdominal ultrasound, which is non-invasive, widely available, and accurate for
screening and measuring the diameter of the aorta. CT angiography is more invasive
and involves radiation and contrast, typically used for surgical planning. X-ray is not
sensitive.
Question 9: A 48-year-old male presents with chest pain that is relieved by
leaning forward, and is accompanied by a fever of 100.8°F. Physical exam
reveals a pericardial friction rub. What is the most common underlying
etiology?
A. Myocardial infarction
B. Uremia
C. Viral infection
D. Tuberculosis
CORRECT ANSWER: C. Viral infection
Rationale:Viral infections are the most common cause of acute pericarditis. The classic
presentation includes pleuritic chest pain that is worse supine and relieved when leaning
forward, a pericardial friction rub, and often a low-grade fever. Myocardial infarction
causes pain not relieved by position. Uremia and TB are less common causes.
Question 10: A 55-year-old female presents with a several-month history of
dry eyes, dry mouth, and joint pain. She reports difficulty eating dry foods and
a gritty sensation in her eyes. What is the most likely diagnosis?
A. Rheumatoid arthritis
B. Systemic lupus erythematosus
C. Sjögren's syndrome
D. Sarcoidosis
CORRECT ANSWER: C. Sjögren's syndrome
Rationale:The classic triad of dry eyes (keratoconjunctivitis sicca), dry mouth
(xerostomia), and arthralgias is the hallmark of primary Sjögren's syndrome, an
Exam, Exam Questions & Answers, Exam Prep Test
Bank, Advanced Pathophysiology, Advanced
Pharmacology, Advanced Physical Assessment,
Differential Diagnosis, Clinical Decision-Making,
Diagnostic Reasoning, Patient Assessment, Evidence-
Based Practice, Detailed Rationales, Nurse
Practitioner Exam Review
Question 1: A 68-year-old male presents with a one-week history of
progressive weakness in his lower extremities, now requiring a cane for
ambulation. He reports no pain but has noticed urinary urgency and mild
constipation. Deep tendon reflexes are brisk in the lower extremities, and a
Babinski sign is present bilaterally. Which of the following is the most likely
diagnosis?
A. Peripheral neuropathy
B. Lumbar spinal stenosis
C. Multiple sclerosis
D. Cervical spondylotic myelopathy
CORRECT ANSWER: D. Cervical spondylotic myelopathy
Rationale:Cervical spondylotic myelopathy (CSM) presents with progressive, painless
weakness and spasticity in the lower extremities (myelopathic gait), often accompanied
by hyperreflexia and extensor plantar responses. Bladder and bowel dysfunction
(urgency/incontinence) can occur. Lumbar stenosis typically causes neurogenic
claudication (pain with walking) and lower motor neuron findings (hyporeflexia) if
severe. Peripheral neuropathy causes distal, symmetric sensory loss and weakness with
diminished reflexes. Multiple sclerosis typically has a relapsing-remitting course and
younger age of onset.
Question 2: A 55-year-old woman with a history of hypertension presents with
acute onset of the worst headache of her life, described as a "thunderclap." On
examination, she is nauseated and has nuchal rigidity. A non-contrast head CT
is negative. What is the most appropriate next step in management?
A. Discharge home with analgesics
B. Lumbar puncture
C. MRI of the brain with contrast
D. CT angiography of the head
CORRECT ANSWER: B. Lumbar puncture
Rationale:The clinical presentation is classic for subarachnoid hemorrhage (SAH).
When a non-contrast head CT is negative (approximately 5-10% of SAH cases,
especially if performed >6 hours after onset), a lumbar puncture is the gold standard to
detect xanthochromia and red blood cells, confirming the diagnosis. CT angiography is
,used to identify the aneurysm after the diagnosis is confirmed. MRI is not the next step.
Discharge is inappropriate without further workup.
Question 3: A 72-year-old male with diabetes and hypertension presents with
a painful, red, swollen left great toe. He denies any trauma. Laboratory tests
reveal an elevated serum uric acid level of 9.2 mg/dL. Joint aspiration reveals
needle-shaped, negatively birefringent crystals under polarized light. What is
the most appropriate initial pharmacologic treatment for the acute flare?
A. Allopurinol
B. Febuxostat
C. Colchicine
D. Probenecid
CORRECT ANSWER: C. Colchicine
Rationale:The acute flare of gout is treated with anti-inflammatory agents: NSAIDs,
colchicine, or corticosteroids. Colchicine is appropriate if started early. Allopurinol and
febuxostat are xanthine oxidase inhibitors used for chronic urate-lowering therapy and
should not be initiated during an acute flare. Probenecid is a uricosuric agent used for
chronic management.
Question 4: A 45-year-old female presents with progressive exertional dyspnea
and a dry cough. She reports a history of rheumatoid arthritis. Physical exam
reveals fine inspiratory crackles at the lung bases. High-resolution CT shows
bilateral reticular opacities and honeycombing. What is the most likely
diagnosis?
A. Pulmonary fibrosis (Usual Interstitial Pneumonia)
B. Pulmonary nodules
C. Pleural effusion
D. Bronchiectasis
CORRECT ANSWER: A. Pulmonary fibrosis (Usual Interstitial Pneumonia)
Rationale:The combination of RA, progressive dyspnea, fine crackles, and HRCT
showing reticular opacities and honeycombing in the lung bases is classic for interstitial
lung disease, specifically Usual Interstitial Pneumonia (UIP)/pulmonary fibrosis.
Rheumatoid arthritis is the most common autoimmune condition associated with ILD.
Nodules, effusions, and bronchiectasis are less consistent with this presentation.
Question 5: A 28-year-old male presents with palpitations, sweating, and
headache. His blood pressure is 180/110 mmHg and heart rate is 110 bpm.
These episodes occur paroxysmally and are associated with a feeling of panic.
Which of the following is the most likely diagnosis?
A. Hyperthyroidism
B. Pheochromocytoma
,C. Cushing's syndrome
D. Anxiety disorder
CORRECT ANSWER: B. Pheochromocytoma
Rationale:Pheochromocytoma presents with the classic triad of episodic headache,
sweating, and palpitations (tachycardia) in the context of severe, labile hypertension.
Hyperthyroidism would cause persistent symptoms. Cushing's syndrome features weight
gain and hypertension, but is less acutely paroxysmal. Anxiety disorder is a diagnosis of
exclusion after medical causes are ruled out.
Question 6: A 60-year-old patient with a history of chronic obstructive
pulmonary disease (COPD) presents with increasing dyspnea and productive
cough. He is on home oxygen. Arterial blood gas on 2 L/min nasal cannula
shows: pH 7.31, PaCO2 65 mmHg, PaO2 55 mmHg, HCO3- 32 mEq/L. How
should the oxygen therapy be adjusted?
A. Maintain current oxygen therapy
B. Increase oxygen to 4 L/min
C. Decrease oxygen to 1 L/min
D. Discontinue oxygen
CORRECT ANSWER: A. Maintain current oxygen therapy
Rationale:This patient has a chronic respiratory acidosis (high PaCO2 and bicarb) from
COPD. The PaO2 is below the target of 60 mmHg; therefore, oxygen should be
continued. Increasing oxygen to 4 L/min can lead to hypercapnia and respiratory
depression by reducing hypoxic drive. Decreasing oxygen is inappropriate. Oxygen
should not be discontinued as it is necessary for tissue oxygenation.
Question 7: A 34-year-old female presents with a 3-month history of fatigue,
joint pain, and a facial rash that worsens with sun exposure. Laboratory tests
reveal ANA positive, anti-dsDNA positive, and low complement levels. Which
of the following is the most appropriate initial therapy for her articular
symptoms?
A. Hydroxychloroquine
B. Prednisone
C. Methotrexate
D. Cyclophosphamide
CORRECT ANSWER: A. Hydroxychloroquine
Rationale:The patient has Systemic Lupus Erythematosus (SLE) based on the positive
ANA and anti-dsDNA, malar rash, and arthritis. Hydroxychloroquine is the standard
initial treatment for mild-to-moderate SLE manifestations, including arthritis and skin
disease. Prednisone is used for more severe organ-threatening disease. Methotrexate
and cyclophosphamide are reserved for refractory or severe cases.
, Question 8: A 72-year-old male presents with a painless, palpable mass in the
right lower quadrant of his abdomen. He reports no change in bowel habits.
On examination, a firm, non-tender, pulsatile mass is palpated. A bruit is
heard on auscultation. What is the most appropriate next step in
management?
A. Ultrasound of the abdomen
B. CT angiography of the abdomen
C. MRI of the abdomen
D. Plain abdominal X-ray
CORRECT ANSWER: A. Ultrasound of the abdomen
Rationale:This presentation is classic for an abdominal aortic aneurysm (AAA) - a
painless, pulsatile mass with a bruit. The most appropriate initial imaging is an
abdominal ultrasound, which is non-invasive, widely available, and accurate for
screening and measuring the diameter of the aorta. CT angiography is more invasive
and involves radiation and contrast, typically used for surgical planning. X-ray is not
sensitive.
Question 9: A 48-year-old male presents with chest pain that is relieved by
leaning forward, and is accompanied by a fever of 100.8°F. Physical exam
reveals a pericardial friction rub. What is the most common underlying
etiology?
A. Myocardial infarction
B. Uremia
C. Viral infection
D. Tuberculosis
CORRECT ANSWER: C. Viral infection
Rationale:Viral infections are the most common cause of acute pericarditis. The classic
presentation includes pleuritic chest pain that is worse supine and relieved when leaning
forward, a pericardial friction rub, and often a low-grade fever. Myocardial infarction
causes pain not relieved by position. Uremia and TB are less common causes.
Question 10: A 55-year-old female presents with a several-month history of
dry eyes, dry mouth, and joint pain. She reports difficulty eating dry foods and
a gritty sensation in her eyes. What is the most likely diagnosis?
A. Rheumatoid arthritis
B. Systemic lupus erythematosus
C. Sjögren's syndrome
D. Sarcoidosis
CORRECT ANSWER: C. Sjögren's syndrome
Rationale:The classic triad of dry eyes (keratoconjunctivitis sicca), dry mouth
(xerostomia), and arthralgias is the hallmark of primary Sjögren's syndrome, an
