NR 576 Exam 1 V2 | NR 576 Differential Diagnosis in Adult-
Gerontology Primary Care | Actual Q&A with Rationale (NR576 Exam
1) | Chamberlain University
1. When conducting a clinical assessment, which component of the diagnostic reasoning
process involves grouping information that appears to be related into meaningful categories?
A. Hypothesis generation
B. Problem representation
C. Diagnostic validation
D. Data clustering
Answer: D
Explanation: Data clustering is the specific step in the diagnostic reasoning process where
the clinician organizes subjective and objective findings into logical groups. This helps the
practitioner identify patterns that may point toward a specific differential diagnosis. By
organizing data this way, the clinician reduces the cognitive load and facilitates the move
toward hypothesis generation and final diagnosis.
2. A 65-year-old male presents with sudden onset of ‘the worst headache of my life.’ Which
of the following is the most appropriate next step for the primary care provider?
A. Prescribe a sumatriptan injection for suspected migraine
B. Perform a detailed neurological exam and schedule an outpatient MRI
C. Direct the patient to the emergency department immediately for a suspected
subarachnoid hemorrhage
D. Advise the patient to take high-dose ibuprofen and follow up in 24 hours
Answer: C
Explanation: The presentation of a ‘thunderclap’ headache or the ‘worst headache of one’s
life’ is a classic red flag for a subarachnoid hemorrhage. This is a medical emergency that
requires immediate neuroimaging (CT scan) and neurosurgical consultation. Delaying care
by performing an outpatient workup or treating for migraines could lead to catastrophic
outcomes including death or permanent disability.
3. In evidence-based practice, what does the ‘specificity’ of a diagnostic test represent?
A. The ability of the test to correctly identify those with the disease
B. The probability that a patient with a positive test actually has the disease
C. The ability of the test to correctly identify those without the disease
,D. The likelihood that a negative test result is a true negative
Answer: C
Explanation: Specificity refers to the true negative rate, meaning the test’s ability to
correctly identify individuals who do not have the condition. A highly specific test has a low
rate of false positives, which is crucial for confirming a diagnosis after a screening test. This
differs from sensitivity, which measures the true positive rate and is used to rule out
diseases when the result is negative.
4. A patient presents with a cough, fever, and tachypnea. During the physical exam, the
provider notes increased tactile fremitus over the right lower lobe. This finding is most
suggestive of:
A. Lobar pneumonia
B. Pleural effusion
C. Pneumothorax
D. Asthma exacerbation
Answer: A
Explanation: Increased tactile fremitus occurs when there is consolidation in the lung
tissue, such as in lobar pneumonia, which conducts sound vibrations more effectively than
air. Conditions like pneumothorax or pleural effusion usually result in decreased or absent
fremitus because air or fluid interferes with the transmission of sound. Understanding
these physical exam findings is essential for differentiating between various pulmonary
pathologies.
5. According to the USPSTF, what is the recommended screening age range for lung cancer
using low-dose computed tomography (LDCT) in adults who have a 20 pack-year smoking
history?
A. 40 to 70 years
B. 55 to 75 years
C. 50 to 80 years
D. 60 to 85 years
Answer: C
Explanation: The current USPSTF guidelines recommend annual screening for lung cancer
with LDCT in adults aged 50 to 80 years who have a 20 pack-year smoking history and
currently smoke or have quit within the past 15 years. This screening should be
discontinued once a person has not smoked for 15 years or develops a health problem that
substantially limits life expectancy. Early detection through LDCT has been shown to
significantly reduce lung cancer mortality in high-risk populations.
, 6. During a cardiac assessment, a holosystolic murmur is heard at the apex that radiates to
the axilla. This is most characteristic of:
A. Mitral regurgitation
B. Aortic stenosis
C. Mitral stenosis
D. Aortic regurgitation
Answer: A
Explanation: Mitral regurgitation is classically described as a holosystolic (pansystolic)
murmur heard best at the apex with radiation to the left axilla. It occurs when the mitral
valve does not close properly, allowing blood to flow backward from the left ventricle into
the left atrium during systole. This distinguishes it from aortic stenosis, which is usually a
mid-systolic crescendo-decrescendo murmur heard best at the second right intercostal
space.
7. Which cranial nerve is being assessed when the provider asks the patient to shrug their
shoulders against resistance?
A. Cranial Nerve XI (Spinal Accessory)
B. Cranial Nerve X (Vagus)
C. Cranial Nerve IX (Glossopharyngeal)
D. Cranial Nerve XII (Hypoglossal)
Answer: A
Explanation: Cranial Nerve XI, the Spinal Accessory nerve, innervates the trapezius and
sternocleidomastoid muscles. Asking a patient to shrug their shoulders and turn their head
against resistance tests the motor function of this specific nerve. Weakness or asymmetry
in these movements may indicate nerve damage or central nervous system pathology.
8. A 45-year-old female reports unilateral facial drooping that occurred suddenly over the last
4 hours. She is unable to wrinkle her forehead on the affected side. What is the most likely
diagnosis?
A. Ischemic stroke
B. Transient Ischemic Attack (TIA)
C. Trigeminal neuralgia
D. Bell’s palsy
Answer: D
Gerontology Primary Care | Actual Q&A with Rationale (NR576 Exam
1) | Chamberlain University
1. When conducting a clinical assessment, which component of the diagnostic reasoning
process involves grouping information that appears to be related into meaningful categories?
A. Hypothesis generation
B. Problem representation
C. Diagnostic validation
D. Data clustering
Answer: D
Explanation: Data clustering is the specific step in the diagnostic reasoning process where
the clinician organizes subjective and objective findings into logical groups. This helps the
practitioner identify patterns that may point toward a specific differential diagnosis. By
organizing data this way, the clinician reduces the cognitive load and facilitates the move
toward hypothesis generation and final diagnosis.
2. A 65-year-old male presents with sudden onset of ‘the worst headache of my life.’ Which
of the following is the most appropriate next step for the primary care provider?
A. Prescribe a sumatriptan injection for suspected migraine
B. Perform a detailed neurological exam and schedule an outpatient MRI
C. Direct the patient to the emergency department immediately for a suspected
subarachnoid hemorrhage
D. Advise the patient to take high-dose ibuprofen and follow up in 24 hours
Answer: C
Explanation: The presentation of a ‘thunderclap’ headache or the ‘worst headache of one’s
life’ is a classic red flag for a subarachnoid hemorrhage. This is a medical emergency that
requires immediate neuroimaging (CT scan) and neurosurgical consultation. Delaying care
by performing an outpatient workup or treating for migraines could lead to catastrophic
outcomes including death or permanent disability.
3. In evidence-based practice, what does the ‘specificity’ of a diagnostic test represent?
A. The ability of the test to correctly identify those with the disease
B. The probability that a patient with a positive test actually has the disease
C. The ability of the test to correctly identify those without the disease
,D. The likelihood that a negative test result is a true negative
Answer: C
Explanation: Specificity refers to the true negative rate, meaning the test’s ability to
correctly identify individuals who do not have the condition. A highly specific test has a low
rate of false positives, which is crucial for confirming a diagnosis after a screening test. This
differs from sensitivity, which measures the true positive rate and is used to rule out
diseases when the result is negative.
4. A patient presents with a cough, fever, and tachypnea. During the physical exam, the
provider notes increased tactile fremitus over the right lower lobe. This finding is most
suggestive of:
A. Lobar pneumonia
B. Pleural effusion
C. Pneumothorax
D. Asthma exacerbation
Answer: A
Explanation: Increased tactile fremitus occurs when there is consolidation in the lung
tissue, such as in lobar pneumonia, which conducts sound vibrations more effectively than
air. Conditions like pneumothorax or pleural effusion usually result in decreased or absent
fremitus because air or fluid interferes with the transmission of sound. Understanding
these physical exam findings is essential for differentiating between various pulmonary
pathologies.
5. According to the USPSTF, what is the recommended screening age range for lung cancer
using low-dose computed tomography (LDCT) in adults who have a 20 pack-year smoking
history?
A. 40 to 70 years
B. 55 to 75 years
C. 50 to 80 years
D. 60 to 85 years
Answer: C
Explanation: The current USPSTF guidelines recommend annual screening for lung cancer
with LDCT in adults aged 50 to 80 years who have a 20 pack-year smoking history and
currently smoke or have quit within the past 15 years. This screening should be
discontinued once a person has not smoked for 15 years or develops a health problem that
substantially limits life expectancy. Early detection through LDCT has been shown to
significantly reduce lung cancer mortality in high-risk populations.
, 6. During a cardiac assessment, a holosystolic murmur is heard at the apex that radiates to
the axilla. This is most characteristic of:
A. Mitral regurgitation
B. Aortic stenosis
C. Mitral stenosis
D. Aortic regurgitation
Answer: A
Explanation: Mitral regurgitation is classically described as a holosystolic (pansystolic)
murmur heard best at the apex with radiation to the left axilla. It occurs when the mitral
valve does not close properly, allowing blood to flow backward from the left ventricle into
the left atrium during systole. This distinguishes it from aortic stenosis, which is usually a
mid-systolic crescendo-decrescendo murmur heard best at the second right intercostal
space.
7. Which cranial nerve is being assessed when the provider asks the patient to shrug their
shoulders against resistance?
A. Cranial Nerve XI (Spinal Accessory)
B. Cranial Nerve X (Vagus)
C. Cranial Nerve IX (Glossopharyngeal)
D. Cranial Nerve XII (Hypoglossal)
Answer: A
Explanation: Cranial Nerve XI, the Spinal Accessory nerve, innervates the trapezius and
sternocleidomastoid muscles. Asking a patient to shrug their shoulders and turn their head
against resistance tests the motor function of this specific nerve. Weakness or asymmetry
in these movements may indicate nerve damage or central nervous system pathology.
8. A 45-year-old female reports unilateral facial drooping that occurred suddenly over the last
4 hours. She is unable to wrinkle her forehead on the affected side. What is the most likely
diagnosis?
A. Ischemic stroke
B. Transient Ischemic Attack (TIA)
C. Trigeminal neuralgia
D. Bell’s palsy
Answer: D
