COMSAE Phase 3 Form CSA 123 Advanced
Clinical Synthesis Exam Practice Questions
& [Verified Answers], Plus Explained
Rationales|2026 Latest Update| Instant
Download PDF
1. A 68-year-old man presents to the emergency department with
sudden severe chest pain radiating to the back. Blood pressure is
180/95 mm Hg in the right arm and 150/80 mm Hg in the left arm. A
chest radiograph shows widening of the mediastinum. Which
diagnosis is most likely?
A. Acute myocardial infarction
B. Pulmonary embolism
C. Aortic dissection
D. Pericarditis
Answer: C. Aortic dissection
Rationale: The combination of abrupt tearing chest pain, unequal arm
blood pressures, and mediastinal widening strongly suggests aortic
dissection. The pathology involves a tear in the aortic intima allowing
blood to enter the media, creating a false lumen.
2. A 55-year-old woman with hypertension and diabetes presents
with confusion, fever, and a headache. Lumbar puncture shows
increased opening pressure, elevated protein, decreased glucose, and
neutrophilic predominance. Which organism is most likely?
,A. Listeria monocytogenes
B. Streptococcus pneumoniae
C. Cryptococcus neoformans
D. Neisseria meningitidis
Answer: B. Streptococcus pneumoniae
Rationale: In adults, Streptococcus pneumoniae is the most common
cause of bacterial meningitis. CSF findings include high neutrophils,
elevated protein, low glucose, and increased opening pressure.
3. A 42-year-old woman develops progressive fatigue, weight loss,
heat intolerance, and palpitations. Examination shows diffuse goiter
and exophthalmos. Which antibody is responsible?
A. Anti-thyroid peroxidase antibody
B. Anti-thyroglobulin antibody
C. Thyroid-stimulating immunoglobulin
D. Anti-acetylcholine receptor antibody
Answer: C. Thyroid-stimulating immunoglobulin
Rationale: Graves disease is caused by antibodies that stimulate the
TSH receptor, resulting in increased thyroid hormone production and
characteristic ophthalmopathy.
4. A patient with chronic kidney disease has potassium of 7.1 mEq/L
and peaked T waves on ECG. What is the immediate treatment?
A. Sodium polystyrene sulfonate
B. IV calcium gluconate
C. Insulin only
D. Loop diuretic
,Answer: B. IV calcium gluconate
Rationale: In severe hyperkalemia with ECG changes, IV calcium
stabilizes the cardiac membrane first. It does not lower potassium but
prevents lethal arrhythmias.
5. A 24-year-old woman presents with sudden unilateral pelvic pain
and vaginal bleeding. Pregnancy test is positive. Ultrasound shows no
intrauterine pregnancy. What is the most likely diagnosis?
A. Threatened abortion
B. Ectopic pregnancy
C. Placental abruption
D. Ovarian torsion
Answer: B. Ectopic pregnancy
Rationale: Positive pregnancy test, pelvic pain, bleeding, and absence
of an intrauterine pregnancy suggest ectopic implantation, most
commonly in the fallopian tube.
6. A 70-year-old man presents with painless hematuria. He has a 50-
pack-year smoking history. Which diagnosis should be suspected?
A. Nephrolithiasis
B. Bladder cancer
C. Benign prostatic hyperplasia
D. Acute pyelonephritis
Answer: B. Bladder cancer
Rationale: Painless hematuria is a classic presentation of urothelial
carcinoma. Smoking is the strongest environmental risk factor.
, 7. A patient with COPD exacerbation has increased dyspnea, increased
sputum production, and increased sputum purulence. What is the
appropriate next step?
A. Antibiotic therapy
B. Immediate intubation
C. Chest tube placement
D. Anticoagulation
Answer: A. Antibiotic therapy
Rationale: The three cardinal symptoms of COPD exacerbation
indicate likely bacterial infection and warrant antibiotics along with
bronchodilators and steroids.
8. A 6-year-old child has barking cough, inspiratory stridor, and
symptoms worsening at night. What is the most appropriate
treatment?
A. Amoxicillin
B. Dexamethasone
C. Albuterol
D. Oseltamivir
Answer: B. Dexamethasone
Rationale: Croup is caused by viral inflammation of the upper airway.
Corticosteroids reduce airway swelling and improve symptoms.
Clinical Synthesis Exam Practice Questions
& [Verified Answers], Plus Explained
Rationales|2026 Latest Update| Instant
Download PDF
1. A 68-year-old man presents to the emergency department with
sudden severe chest pain radiating to the back. Blood pressure is
180/95 mm Hg in the right arm and 150/80 mm Hg in the left arm. A
chest radiograph shows widening of the mediastinum. Which
diagnosis is most likely?
A. Acute myocardial infarction
B. Pulmonary embolism
C. Aortic dissection
D. Pericarditis
Answer: C. Aortic dissection
Rationale: The combination of abrupt tearing chest pain, unequal arm
blood pressures, and mediastinal widening strongly suggests aortic
dissection. The pathology involves a tear in the aortic intima allowing
blood to enter the media, creating a false lumen.
2. A 55-year-old woman with hypertension and diabetes presents
with confusion, fever, and a headache. Lumbar puncture shows
increased opening pressure, elevated protein, decreased glucose, and
neutrophilic predominance. Which organism is most likely?
,A. Listeria monocytogenes
B. Streptococcus pneumoniae
C. Cryptococcus neoformans
D. Neisseria meningitidis
Answer: B. Streptococcus pneumoniae
Rationale: In adults, Streptococcus pneumoniae is the most common
cause of bacterial meningitis. CSF findings include high neutrophils,
elevated protein, low glucose, and increased opening pressure.
3. A 42-year-old woman develops progressive fatigue, weight loss,
heat intolerance, and palpitations. Examination shows diffuse goiter
and exophthalmos. Which antibody is responsible?
A. Anti-thyroid peroxidase antibody
B. Anti-thyroglobulin antibody
C. Thyroid-stimulating immunoglobulin
D. Anti-acetylcholine receptor antibody
Answer: C. Thyroid-stimulating immunoglobulin
Rationale: Graves disease is caused by antibodies that stimulate the
TSH receptor, resulting in increased thyroid hormone production and
characteristic ophthalmopathy.
4. A patient with chronic kidney disease has potassium of 7.1 mEq/L
and peaked T waves on ECG. What is the immediate treatment?
A. Sodium polystyrene sulfonate
B. IV calcium gluconate
C. Insulin only
D. Loop diuretic
,Answer: B. IV calcium gluconate
Rationale: In severe hyperkalemia with ECG changes, IV calcium
stabilizes the cardiac membrane first. It does not lower potassium but
prevents lethal arrhythmias.
5. A 24-year-old woman presents with sudden unilateral pelvic pain
and vaginal bleeding. Pregnancy test is positive. Ultrasound shows no
intrauterine pregnancy. What is the most likely diagnosis?
A. Threatened abortion
B. Ectopic pregnancy
C. Placental abruption
D. Ovarian torsion
Answer: B. Ectopic pregnancy
Rationale: Positive pregnancy test, pelvic pain, bleeding, and absence
of an intrauterine pregnancy suggest ectopic implantation, most
commonly in the fallopian tube.
6. A 70-year-old man presents with painless hematuria. He has a 50-
pack-year smoking history. Which diagnosis should be suspected?
A. Nephrolithiasis
B. Bladder cancer
C. Benign prostatic hyperplasia
D. Acute pyelonephritis
Answer: B. Bladder cancer
Rationale: Painless hematuria is a classic presentation of urothelial
carcinoma. Smoking is the strongest environmental risk factor.
, 7. A patient with COPD exacerbation has increased dyspnea, increased
sputum production, and increased sputum purulence. What is the
appropriate next step?
A. Antibiotic therapy
B. Immediate intubation
C. Chest tube placement
D. Anticoagulation
Answer: A. Antibiotic therapy
Rationale: The three cardinal symptoms of COPD exacerbation
indicate likely bacterial infection and warrant antibiotics along with
bronchodilators and steroids.
8. A 6-year-old child has barking cough, inspiratory stridor, and
symptoms worsening at night. What is the most appropriate
treatment?
A. Amoxicillin
B. Dexamethasone
C. Albuterol
D. Oseltamivir
Answer: B. Dexamethasone
Rationale: Croup is caused by viral inflammation of the upper airway.
Corticosteroids reduce airway swelling and improve symptoms.
