NR 511 / NR511 Midterm Exam 2026/2027 |
Differential Diagnosis & Primary Care
Practicum Review | Verified Questions,
Answers & Rationales | Chamberlain
University
• This exam contains 200 verified questions with answers and EXPERT RATIONALE
designed to prepare you for the NR511 Midterm at Chamberlain University — study
by attempting each question first before checking the highlighted correct answer
and EXPERT RATIONALE below it.
• Each question reflects core differential diagnosis and primary care practicum
competencies — use the EXPERT RATIONALE actively to reinforce clinical
reasoning, not just memorization.
1. A 45-year-old male presents with a painful, swollen first
metatarsophalangeal joint. He reports eating a large meal with alcohol the
night before. Which of the following is the MOST likely diagnosis?
A. Rheumatoid arthritis
B. Osteoarthritis
C. Pseudogout
D. Septic arthritis
E. Gout
Correct Answer: E. Gout
EXPERT RATIONALE: Gout commonly presents with acute monoarthritis of the first
MTP joint (podagra), often triggered by dietary purines and alcohol. Urate crystals
deposit in joints causing intense inflammation.
2. Which laboratory finding is MOST consistent with a diagnosis of gout?
A. Elevated ESR
,B. Positive rheumatoid factor
C. Low serum calcium
D. Elevated ANA
E. Elevated serum uric acid
Correct Answer: E. Elevated serum uric acid
EXPERT RATIONALE: Hyperuricemia (elevated serum uric acid) is the hallmark lab
finding in gout. However, uric acid can be normal during an acute attack, so clinical
presentation guides diagnosis.
3. A 60-year-old woman presents with bilateral knee pain that worsens with
activity and improves with rest. X-ray shows joint space narrowing and
osteophytes. What is the MOST likely diagnosis?
A. Rheumatoid arthritis
B. Gout
C. Psoriatic arthritis
D. Fibromyalgia
E. Osteoarthritis
Correct Answer: E. Osteoarthritis
EXPERT RATIONALE: Osteoarthritis is characterized by joint space narrowing,
osteophyte formation, and subchondral sclerosis on X-ray. It worsens with activity
and is common in weight-bearing joints of older adults.
4. Which of the following is the FIRST-LINE treatment for mild-to-moderate
osteoarthritis of the knee?
A. Opioid analgesics
B. Corticosteroid injection
,C. Hydroxychloroquine
D. Methotrexate
E. Acetaminophen and exercise
Correct Answer: E. Acetaminophen and exercise
EXPERT RATIONALE: First-line management of osteoarthritis includes
acetaminophen for pain relief, combined with physical therapy and exercise to
strengthen surrounding muscles and improve joint function.
5. A 35-year-old woman presents with morning stiffness lasting more than
one hour, bilateral wrist and MCP joint swelling, and fatigue. Which diagnosis
is MOST likely?
A. Osteoarthritis
B. Gout
C. Fibromyalgia
D. Systemic lupus erythematosus
E. Rheumatoid arthritis
Correct Answer: E. Rheumatoid arthritis
EXPERT RATIONALE: Rheumatoid arthritis presents with symmetric polyarthritis,
prolonged morning stiffness >1 hour, and involvement of small joints (MCP, PIP,
wrists). It is an autoimmune condition more common in women.
6. Which laboratory test is MOST specific for rheumatoid arthritis?
A. ANA
B. ESR
C. CRP
D. Rheumatoid factor
, E. Anti-CCP antibodies
Correct Answer: E. Anti-CCP antibodies
EXPERT RATIONALE: Anti-cyclic citrullinated peptide (anti-CCP) antibodies have
higher specificity (~95%) for rheumatoid arthritis compared to rheumatoid factor
and are useful for early diagnosis and prognosis.
7. A patient is diagnosed with rheumatoid arthritis. Which of the following is
the FIRST-LINE disease-modifying antirheumatic drug (DMARD)?
A. Prednisone
B. Hydroxychloroquine
C. Sulfasalazine
D. Leflunomide
E. Methotrexate
Correct Answer: E. Methotrexate
EXPERT RATIONALE: Methotrexate is the anchor DMARD and first-line treatment
for rheumatoid arthritis due to its efficacy, tolerability, and long-term safety profile.
8. A 28-year-old male presents with lower back pain and morning stiffness
that improves with exercise. HLA-B27 is positive. What is the MOST likely
diagnosis?
A. Mechanical low back pain
B. Rheumatoid arthritis
C. Psoriatic arthritis
D. Reactive arthritis
E. Ankylosing spondylitis
Correct Answer: E. Ankylosing spondylitis
Differential Diagnosis & Primary Care
Practicum Review | Verified Questions,
Answers & Rationales | Chamberlain
University
• This exam contains 200 verified questions with answers and EXPERT RATIONALE
designed to prepare you for the NR511 Midterm at Chamberlain University — study
by attempting each question first before checking the highlighted correct answer
and EXPERT RATIONALE below it.
• Each question reflects core differential diagnosis and primary care practicum
competencies — use the EXPERT RATIONALE actively to reinforce clinical
reasoning, not just memorization.
1. A 45-year-old male presents with a painful, swollen first
metatarsophalangeal joint. He reports eating a large meal with alcohol the
night before. Which of the following is the MOST likely diagnosis?
A. Rheumatoid arthritis
B. Osteoarthritis
C. Pseudogout
D. Septic arthritis
E. Gout
Correct Answer: E. Gout
EXPERT RATIONALE: Gout commonly presents with acute monoarthritis of the first
MTP joint (podagra), often triggered by dietary purines and alcohol. Urate crystals
deposit in joints causing intense inflammation.
2. Which laboratory finding is MOST consistent with a diagnosis of gout?
A. Elevated ESR
,B. Positive rheumatoid factor
C. Low serum calcium
D. Elevated ANA
E. Elevated serum uric acid
Correct Answer: E. Elevated serum uric acid
EXPERT RATIONALE: Hyperuricemia (elevated serum uric acid) is the hallmark lab
finding in gout. However, uric acid can be normal during an acute attack, so clinical
presentation guides diagnosis.
3. A 60-year-old woman presents with bilateral knee pain that worsens with
activity and improves with rest. X-ray shows joint space narrowing and
osteophytes. What is the MOST likely diagnosis?
A. Rheumatoid arthritis
B. Gout
C. Psoriatic arthritis
D. Fibromyalgia
E. Osteoarthritis
Correct Answer: E. Osteoarthritis
EXPERT RATIONALE: Osteoarthritis is characterized by joint space narrowing,
osteophyte formation, and subchondral sclerosis on X-ray. It worsens with activity
and is common in weight-bearing joints of older adults.
4. Which of the following is the FIRST-LINE treatment for mild-to-moderate
osteoarthritis of the knee?
A. Opioid analgesics
B. Corticosteroid injection
,C. Hydroxychloroquine
D. Methotrexate
E. Acetaminophen and exercise
Correct Answer: E. Acetaminophen and exercise
EXPERT RATIONALE: First-line management of osteoarthritis includes
acetaminophen for pain relief, combined with physical therapy and exercise to
strengthen surrounding muscles and improve joint function.
5. A 35-year-old woman presents with morning stiffness lasting more than
one hour, bilateral wrist and MCP joint swelling, and fatigue. Which diagnosis
is MOST likely?
A. Osteoarthritis
B. Gout
C. Fibromyalgia
D. Systemic lupus erythematosus
E. Rheumatoid arthritis
Correct Answer: E. Rheumatoid arthritis
EXPERT RATIONALE: Rheumatoid arthritis presents with symmetric polyarthritis,
prolonged morning stiffness >1 hour, and involvement of small joints (MCP, PIP,
wrists). It is an autoimmune condition more common in women.
6. Which laboratory test is MOST specific for rheumatoid arthritis?
A. ANA
B. ESR
C. CRP
D. Rheumatoid factor
, E. Anti-CCP antibodies
Correct Answer: E. Anti-CCP antibodies
EXPERT RATIONALE: Anti-cyclic citrullinated peptide (anti-CCP) antibodies have
higher specificity (~95%) for rheumatoid arthritis compared to rheumatoid factor
and are useful for early diagnosis and prognosis.
7. A patient is diagnosed with rheumatoid arthritis. Which of the following is
the FIRST-LINE disease-modifying antirheumatic drug (DMARD)?
A. Prednisone
B. Hydroxychloroquine
C. Sulfasalazine
D. Leflunomide
E. Methotrexate
Correct Answer: E. Methotrexate
EXPERT RATIONALE: Methotrexate is the anchor DMARD and first-line treatment
for rheumatoid arthritis due to its efficacy, tolerability, and long-term safety profile.
8. A 28-year-old male presents with lower back pain and morning stiffness
that improves with exercise. HLA-B27 is positive. What is the MOST likely
diagnosis?
A. Mechanical low back pain
B. Rheumatoid arthritis
C. Psoriatic arthritis
D. Reactive arthritis
E. Ankylosing spondylitis
Correct Answer: E. Ankylosing spondylitis
