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Chamberlain NR 511 Differential Diagnosis &
Primary Care I Midterm Examination –
Chamberlain
This comprehensive practice exam is designed to mirror the difficulty and scope of the Chamberlain NR
511 Midterm. It covers the most tested and challenging concepts in differential diagnosis, primary care,
and clinical reasoning. Each question includes the correct answer and a detailed rationale to reinforce
your understanding.
Exam Overview
NR 511 focuses on the foundational principles of differential diagnosis in primary care. Key content
areas include:
• Clinical Decision Making & Diagnostic Reasoning
• Dermatologic Conditions
• Ear, Nose, & Throat (ENT)
• Respiratory & Cardiovascular
• Gastrointestinal & Genitourinary
• Musculoskeletal & Neurologic
• Endocrine & Metabolic
• Psychosocial & Preventive Care
Section 1: Clinical Decision Making & Diagnostic Reasoning
1. A 45-year-old male presents with acute onset of right lower quadrant pain, nausea, and low-grade
fever. Which of the following is the most appropriate next step in the diagnostic process?
A) Order a complete blood count and abdominal CT
B) Perform a focused history and physical examination
C) Refer to a surgeon immediately
D) Administer analgesics and discharge
✔✔ Correct Answer✔✔ B. Perform a focused history and physical examination
Rationale: The initial step in any diagnostic evaluation is a thorough history and physical examination.
Testing and referrals are guided by findings from the history and physical.
,2
2. A patient presents with fatigue, weight gain, and cold intolerance. The nurse practitioner suspects
hypothyroidism. Which of the following laboratory tests is most specific for confirming this diagnosis?
A) Total T4
B) Free T4
C) Thyroid-stimulating hormone (TSH)
D) Thyroid peroxidase antibodies
✔✔ Correct Answer✔✔ C. Thyroid-stimulating hormone (TSH)
Rationale: TSH is the most sensitive and specific screening test for thyroid dysfunction. An elevated TSH
confirms primary hypothyroidism.
3. A 60-year-old patient with hypertension and diabetes presents with a 3-day history of dizziness and
lightheadedness upon standing. Vital signs: supine BP 130/80, standing BP 100/60, HR increases from
80 to 100. What is the most likely diagnosis?
A) Benign paroxysmal positional vertigo
B) Orthostatic hypotension
C) Cerebrovascular accident
D) Anxiety disorder
✔✔ Correct Answer✔✔ B. Orthostatic hypotension
Rationale: Orthostatic hypotension is defined as a drop in systolic BP ≥20 mmHg or diastolic BP ≥10
mmHg within 3 minutes of standing. Common in patients with diabetes, hypertension, or on
antihypertensive medications.
4. Which of the following clinical reasoning strategies involves generating a list of possible diagnoses
based on presenting symptoms?
A) Differential diagnosis
B) Pattern recognition
C) Bayesian analysis
D) Heuristic reasoning
✔✔ Correct Answer✔✔ A. Differential diagnosis
Rationale: Differential diagnosis is the process of systematically considering possible causes of a
patient's symptoms and narrowing down to the most likely.
5. A 28-year-old female presents with a sore throat, fever, and tender anterior cervical
lymphadenopathy. Rapid strep test is negative. Which of the following should be considered next?
A) Prescribe antibiotics empirically
B) Obtain a throat culture
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C) Reassure and discharge
D) Order a complete blood count
✔✔ Correct Answer✔✔ B. Obtain a throat culture
Rationale: In adults with a negative rapid strep test but high suspicion for Group A Streptococcus, a
throat culture is recommended to confirm diagnosis.
6. A 55-year-old male with a 30-pack-year smoking history presents with a new cough and
hemoptysis. Which of the following is the priority at this visit?
A) Order a chest x-ray
B) Assess for red flags and urgent referral
C) Prescribe an antibiotic
D) Recommend smoking cessation only
✔✔ Correct Answer✔✔ B. Assess for red flags and urgent referral
Rationale: Hemoptysis in a smoker is a red flag for lung cancer. Urgent evaluation is required, including
immediate referral for chest imaging.
7. Which of the following is an example of a "red flag" finding in a patient with headache?
A) Gradual onset over hours
B) Sudden, severe "thunderclap" onset
C) Mild photophobia
D) Tension-type pattern
✔✔ Correct Answer✔✔ B. Sudden, severe "thunderclap" onset
Rationale: Thunderclap headache is a red flag for subarachnoid hemorrhage and requires immediate
evaluation.
8. The nurse practitioner is using the Ottawa Ankle Rules to evaluate a patient with ankle pain after a
twisting injury. Which finding would warrant an x-ray?
A) Ability to bear weight immediately
B) Tenderness over the lateral malleolus
C) Absence of swelling
D) Full range of motion
✔✔ Correct Answer✔✔ B. Tenderness over the lateral malleolus
Rationale: Ottawa Ankle Rules indicate x-ray if there is tenderness over the medial or lateral malleolus
or inability to bear weight immediately after injury and in the emergency department.
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Section 2: Dermatology
9. A 12-year-old presents with an intensely pruritic rash on the flexural surfaces of the elbows and
knees. The skin is erythematous, with excoriations and lichenification. What is the most likely
diagnosis?
A) Contact dermatitis
B) Atopic dermatitis
C) Psoriasis
D) Tinea corporis
✔✔ Correct Answer✔✔ B. Atopic dermatitis
Rationale: Atopic dermatitis typically presents with pruritic, erythematous patches in flexural areas with
chronic lichenification from scratching.
10. A 35-year-old presents with a circular, erythematous patch on the trunk with a raised border and
central clearing. What is the most likely diagnosis?
A) Tinea corporis
B) Psoriasis
C) Pityriasis rosea
D) Lyme disease
✔✔ Correct Answer✔✔ A. Tinea corporis
Rationale: Tinea corporis (ringworm) presents as annular lesions with central clearing and an active
border.
11. A patient presents with multiple scaly, silvery plaques on the elbows and knees. Which of the
following is the most likely diagnosis?
A) Atopic dermatitis
B) Psoriasis
C) Seborrheic dermatitis
D) Lichen planus
✔✔ Correct Answer✔✔ B. Psoriasis
Rationale: Psoriasis commonly presents with well-demarcated, silvery scaly plaques on extensor
surfaces.
12. A 25-year-old presents with an erythematous rash on the face involving the cheeks and nose,
sparing the nasolabial folds. Which condition does this describe?
A) Acne rosacea
B) Systemic lupus erythematosus (malar rash)
Chamberlain NR 511 Differential Diagnosis &
Primary Care I Midterm Examination –
Chamberlain
This comprehensive practice exam is designed to mirror the difficulty and scope of the Chamberlain NR
511 Midterm. It covers the most tested and challenging concepts in differential diagnosis, primary care,
and clinical reasoning. Each question includes the correct answer and a detailed rationale to reinforce
your understanding.
Exam Overview
NR 511 focuses on the foundational principles of differential diagnosis in primary care. Key content
areas include:
• Clinical Decision Making & Diagnostic Reasoning
• Dermatologic Conditions
• Ear, Nose, & Throat (ENT)
• Respiratory & Cardiovascular
• Gastrointestinal & Genitourinary
• Musculoskeletal & Neurologic
• Endocrine & Metabolic
• Psychosocial & Preventive Care
Section 1: Clinical Decision Making & Diagnostic Reasoning
1. A 45-year-old male presents with acute onset of right lower quadrant pain, nausea, and low-grade
fever. Which of the following is the most appropriate next step in the diagnostic process?
A) Order a complete blood count and abdominal CT
B) Perform a focused history and physical examination
C) Refer to a surgeon immediately
D) Administer analgesics and discharge
✔✔ Correct Answer✔✔ B. Perform a focused history and physical examination
Rationale: The initial step in any diagnostic evaluation is a thorough history and physical examination.
Testing and referrals are guided by findings from the history and physical.
,2
2. A patient presents with fatigue, weight gain, and cold intolerance. The nurse practitioner suspects
hypothyroidism. Which of the following laboratory tests is most specific for confirming this diagnosis?
A) Total T4
B) Free T4
C) Thyroid-stimulating hormone (TSH)
D) Thyroid peroxidase antibodies
✔✔ Correct Answer✔✔ C. Thyroid-stimulating hormone (TSH)
Rationale: TSH is the most sensitive and specific screening test for thyroid dysfunction. An elevated TSH
confirms primary hypothyroidism.
3. A 60-year-old patient with hypertension and diabetes presents with a 3-day history of dizziness and
lightheadedness upon standing. Vital signs: supine BP 130/80, standing BP 100/60, HR increases from
80 to 100. What is the most likely diagnosis?
A) Benign paroxysmal positional vertigo
B) Orthostatic hypotension
C) Cerebrovascular accident
D) Anxiety disorder
✔✔ Correct Answer✔✔ B. Orthostatic hypotension
Rationale: Orthostatic hypotension is defined as a drop in systolic BP ≥20 mmHg or diastolic BP ≥10
mmHg within 3 minutes of standing. Common in patients with diabetes, hypertension, or on
antihypertensive medications.
4. Which of the following clinical reasoning strategies involves generating a list of possible diagnoses
based on presenting symptoms?
A) Differential diagnosis
B) Pattern recognition
C) Bayesian analysis
D) Heuristic reasoning
✔✔ Correct Answer✔✔ A. Differential diagnosis
Rationale: Differential diagnosis is the process of systematically considering possible causes of a
patient's symptoms and narrowing down to the most likely.
5. A 28-year-old female presents with a sore throat, fever, and tender anterior cervical
lymphadenopathy. Rapid strep test is negative. Which of the following should be considered next?
A) Prescribe antibiotics empirically
B) Obtain a throat culture
,3
C) Reassure and discharge
D) Order a complete blood count
✔✔ Correct Answer✔✔ B. Obtain a throat culture
Rationale: In adults with a negative rapid strep test but high suspicion for Group A Streptococcus, a
throat culture is recommended to confirm diagnosis.
6. A 55-year-old male with a 30-pack-year smoking history presents with a new cough and
hemoptysis. Which of the following is the priority at this visit?
A) Order a chest x-ray
B) Assess for red flags and urgent referral
C) Prescribe an antibiotic
D) Recommend smoking cessation only
✔✔ Correct Answer✔✔ B. Assess for red flags and urgent referral
Rationale: Hemoptysis in a smoker is a red flag for lung cancer. Urgent evaluation is required, including
immediate referral for chest imaging.
7. Which of the following is an example of a "red flag" finding in a patient with headache?
A) Gradual onset over hours
B) Sudden, severe "thunderclap" onset
C) Mild photophobia
D) Tension-type pattern
✔✔ Correct Answer✔✔ B. Sudden, severe "thunderclap" onset
Rationale: Thunderclap headache is a red flag for subarachnoid hemorrhage and requires immediate
evaluation.
8. The nurse practitioner is using the Ottawa Ankle Rules to evaluate a patient with ankle pain after a
twisting injury. Which finding would warrant an x-ray?
A) Ability to bear weight immediately
B) Tenderness over the lateral malleolus
C) Absence of swelling
D) Full range of motion
✔✔ Correct Answer✔✔ B. Tenderness over the lateral malleolus
Rationale: Ottawa Ankle Rules indicate x-ray if there is tenderness over the medial or lateral malleolus
or inability to bear weight immediately after injury and in the emergency department.
, 4
Section 2: Dermatology
9. A 12-year-old presents with an intensely pruritic rash on the flexural surfaces of the elbows and
knees. The skin is erythematous, with excoriations and lichenification. What is the most likely
diagnosis?
A) Contact dermatitis
B) Atopic dermatitis
C) Psoriasis
D) Tinea corporis
✔✔ Correct Answer✔✔ B. Atopic dermatitis
Rationale: Atopic dermatitis typically presents with pruritic, erythematous patches in flexural areas with
chronic lichenification from scratching.
10. A 35-year-old presents with a circular, erythematous patch on the trunk with a raised border and
central clearing. What is the most likely diagnosis?
A) Tinea corporis
B) Psoriasis
C) Pityriasis rosea
D) Lyme disease
✔✔ Correct Answer✔✔ A. Tinea corporis
Rationale: Tinea corporis (ringworm) presents as annular lesions with central clearing and an active
border.
11. A patient presents with multiple scaly, silvery plaques on the elbows and knees. Which of the
following is the most likely diagnosis?
A) Atopic dermatitis
B) Psoriasis
C) Seborrheic dermatitis
D) Lichen planus
✔✔ Correct Answer✔✔ B. Psoriasis
Rationale: Psoriasis commonly presents with well-demarcated, silvery scaly plaques on extensor
surfaces.
12. A 25-year-old presents with an erythematous rash on the face involving the cheeks and nose,
sparing the nasolabial folds. Which condition does this describe?
A) Acne rosacea
B) Systemic lupus erythematosus (malar rash)
