NR 511 Midterm Practice Exam – 2026 Edition 180 Questions &
Answers with Detailed Rationales
SECTION 1: DIAGNOSTIC REASONING & CLINICAL DECISION-MAKING (Questions
1-25)
1. A 45-year-old male presents with acute onset of severe right lower quadrant
abdominal pain, nausea, and anorexia. On examination, he has rebound
tenderness and guarding in the right lower quadrant. Which of the following is
the most likely diagnosis?
• A) Acute cholecystitis
• B) Acute pancreatitis
• C) Acute appendicitis
• D) Diverticulitis
,CorreCt Answer: C. Acute appendicitis typically presents with periumbilical
pain migrating to the right lower quadrant (RLQ), associated with nausea,
anorexia, and rebound tenderness (McBurney's point). Cholecystitis presents with
RUQ pain; pancreatitis with epigastric pain radiating to the back; diverticulitis with
LLQ pain.
2. A 60-year-old female with a history of hypertension presents with sudden
onset of severe headache, nausea, vomiting, and photophobia. She reports this
is the "worst headache of my life." Which diagnosis must be ruled out
immediately?
• A) Tension headache
• B) Migraine with aura
, • C) Subarachnoid hemorrhage
• D) Cluster headache
CorreCt Answer: C. "Worst headache of my life" is the classic presentation of
subarachnoid hemorrhage (SAH) until proven otherwise. Tension headaches are
bilateral and band-like; migraines may have photophobia but are typically
recurrent; cluster headaches are unilateral and periorbital.
3. In the clinical reasoning process, what is the primary purpose of developing a
differential diagnosis?
• A) To list every possible condition the patient could have
• B) To prioritize the most likely and most dangerous conditions
• C) To eliminate the need for diagnostic testing
, • D) To confirm the final diagnosis immediately
CorreCt Answer: B. The purpose of a differential diagnosis is to systematically
consider possible causes of the patient's presentation, prioritizing those that are
most common, most likely, and most dangerous. It helps guide further workup
and testing.
4. A 30-year-old female presents with fatigue, weight gain, cold intolerance, and
dry skin. Her TSH is elevated and free T4 is low. What is the most likely
diagnosis?
• A) Hyperthyroidism
• B) Hypothyroidism
• C) Subclinical hypothyroidism
Answers with Detailed Rationales
SECTION 1: DIAGNOSTIC REASONING & CLINICAL DECISION-MAKING (Questions
1-25)
1. A 45-year-old male presents with acute onset of severe right lower quadrant
abdominal pain, nausea, and anorexia. On examination, he has rebound
tenderness and guarding in the right lower quadrant. Which of the following is
the most likely diagnosis?
• A) Acute cholecystitis
• B) Acute pancreatitis
• C) Acute appendicitis
• D) Diverticulitis
,CorreCt Answer: C. Acute appendicitis typically presents with periumbilical
pain migrating to the right lower quadrant (RLQ), associated with nausea,
anorexia, and rebound tenderness (McBurney's point). Cholecystitis presents with
RUQ pain; pancreatitis with epigastric pain radiating to the back; diverticulitis with
LLQ pain.
2. A 60-year-old female with a history of hypertension presents with sudden
onset of severe headache, nausea, vomiting, and photophobia. She reports this
is the "worst headache of my life." Which diagnosis must be ruled out
immediately?
• A) Tension headache
• B) Migraine with aura
, • C) Subarachnoid hemorrhage
• D) Cluster headache
CorreCt Answer: C. "Worst headache of my life" is the classic presentation of
subarachnoid hemorrhage (SAH) until proven otherwise. Tension headaches are
bilateral and band-like; migraines may have photophobia but are typically
recurrent; cluster headaches are unilateral and periorbital.
3. In the clinical reasoning process, what is the primary purpose of developing a
differential diagnosis?
• A) To list every possible condition the patient could have
• B) To prioritize the most likely and most dangerous conditions
• C) To eliminate the need for diagnostic testing
, • D) To confirm the final diagnosis immediately
CorreCt Answer: B. The purpose of a differential diagnosis is to systematically
consider possible causes of the patient's presentation, prioritizing those that are
most common, most likely, and most dangerous. It helps guide further workup
and testing.
4. A 30-year-old female presents with fatigue, weight gain, cold intolerance, and
dry skin. Her TSH is elevated and free T4 is low. What is the most likely
diagnosis?
• A) Hyperthyroidism
• B) Hypothyroidism
• C) Subclinical hypothyroidism
