COMLEX-USA LEVEL 2-CE: COMPREHENSIVE HIGH-YIELD
EXAMINATION – 200 BOARD-STYLE QUESTIONS WITH
VERIFIED ANSWERS, DETAILED CLINICAL RATIONALES, AND
UPDATED EVIDENCE-BASED GUIDELINES FOR OSTEOPATHIC
MEDICAL LICENSURE
1. A 72-year-old man presents with a 3-month history of progressive
lower back pain, fatigue, and unintentional weight loss. Laboratory
studies reveal anemia, elevated serum creatinine, and hypercalcemia.
A skeletal survey shows multiple lytic lesions in the skull and spine.
What is the most likely diagnosis?
A) Metastatic prostate cancer
B) Multiple myeloma
C) Paget disease of bone
D) Osteoporosis
Answer: B) Multiple myeloma
Rationale: The classic triad of hypercalcemia, anemia, and renal
insufficiency with lytic bone lesions in an older adult is highly suspicious
for multiple myeloma.
2. A 25-year-old woman with a history of systemic lupus
erythematosus presents with acute onset of pleuritic chest pain,
dyspnea, and a low-grade fever. An echocardiogram reveals a
moderate pericardial effusion. Which of the following is the most
likely underlying cause?
A) Bacterial pericarditis
,B) Uremic pericarditis
C) Lupus pericarditis
D) Post-MI pericarditis
Answer: C) Lupus pericarditis
Rationale: Pericarditis is a common manifestation of SLE, particularly in
young women, and can present with pericardial effusion.
3. A 6-month-old infant presents with failure to thrive, recurrent
respiratory infections, and a history of watery diarrhea since birth.
Physical exam reveals poor weight gain and muscle wasting. Which of
the following is the most likely diagnosis?
A) Cystic fibrosis
B) Celiac disease
C) Congenital sucrase-isomaltase deficiency
D) Primary immunodeficiency
Answer: A) Cystic fibrosis
Rationale: Failure to thrive, recurrent respiratory infections, and chronic
diarrhea in an infant are classic for cystic fibrosis, which causes
pancreatic insufficiency and pulmonary disease.
4. A 45-year-old man with a history of hypertension presents with
sudden onset of severe, tearing chest pain radiating to his back. His
blood pressure is 180/110 mmHg in the right arm and 130/80 mmHg
in the left arm. Which of the following is the most likely diagnosis?
A) Acute myocardial infarction
B) Pulmonary embolism
C) Aortic dissection
D) Pericarditis
Answer: C) Aortic dissection
,Rationale: Tearing chest pain radiating to the back with asymmetric
blood pressures between arms is classic for aortic dissection.
5. A 30-year-old woman presents with palpitations, heat intolerance,
and weight loss despite increased appetite. On exam, she has a
diffuse, painless goiter and bilateral proptosis. Which of the following
is the most likely diagnosis?
A) Toxic multinodular goiter
B) Graves disease
C) Subacute thyroiditis
D) Hashimoto thyroiditis
Answer: B) Graves disease
Rationale: The combination of hyperthyroidism symptoms, diffuse
goiter, and proptosis is pathognomonic for Graves disease.
6. A 55-year-old man with a 30-pack-year smoking history presents
with a chronic cough, hemoptysis, and weight loss. Chest X-ray shows
a right hilar mass. Which of the following is the most likely diagnosis?
A) Small cell lung cancer
B) Squamous cell carcinoma
C) Adenocarcinoma
D) Bronchial carcinoid
Answer: B) Squamous cell carcinoma
Rationale: Central hilar mass with hemoptysis in a heavy smoker is most
consistent with squamous cell carcinoma of the lung.
7. A 68-year-old woman presents with sudden onset of severe
headache, nausea, and vomiting. She is found to have a blood
pressure of 220/120 mmHg. Neurological exam reveals nuchal rigidity.
A non-contrast head CT shows hyperdense material in the basal
, cisterns. Which of the following is the most likely diagnosis?
A) Ischemic stroke
B) Subarachnoid hemorrhage
C) Epidural hematoma
D) Subdural hematoma
Answer: B) Subarachnoid hemorrhage
Rationale: Sudden severe headache ("thunderclap"), nuchal rigidity, and
hyperdense blood in the basal cisterns on CT are classic for
subarachnoid hemorrhage.
8. A 40-year-old man with a history of intravenous drug use presents
with fever, malaise, and a new heart murmur. Blood cultures are
positive for Gram-positive cocci in clusters. Which of the following is
the most likely diagnosis?
A) Acute rheumatic fever
B) Infective endocarditis
C) Viral myocarditis
D) Pericarditis
Answer: B) Infective endocarditis
Rationale: Fever, new heart murmur, and positive blood cultures in a
patient with IV drug use are classic for infective endocarditis, often
caused by Staphylococcus aureus.
9. A 65-year-old man presents with a 6-month history of progressive
dysphagia, first to solids and now to liquids. He also reports weight
loss and odynophagia. Which of the following is the most likely
diagnosis?
A) Gastroesophageal reflux disease
B) Esophageal stricture
C) Esophageal adenocarcinoma
EXAMINATION – 200 BOARD-STYLE QUESTIONS WITH
VERIFIED ANSWERS, DETAILED CLINICAL RATIONALES, AND
UPDATED EVIDENCE-BASED GUIDELINES FOR OSTEOPATHIC
MEDICAL LICENSURE
1. A 72-year-old man presents with a 3-month history of progressive
lower back pain, fatigue, and unintentional weight loss. Laboratory
studies reveal anemia, elevated serum creatinine, and hypercalcemia.
A skeletal survey shows multiple lytic lesions in the skull and spine.
What is the most likely diagnosis?
A) Metastatic prostate cancer
B) Multiple myeloma
C) Paget disease of bone
D) Osteoporosis
Answer: B) Multiple myeloma
Rationale: The classic triad of hypercalcemia, anemia, and renal
insufficiency with lytic bone lesions in an older adult is highly suspicious
for multiple myeloma.
2. A 25-year-old woman with a history of systemic lupus
erythematosus presents with acute onset of pleuritic chest pain,
dyspnea, and a low-grade fever. An echocardiogram reveals a
moderate pericardial effusion. Which of the following is the most
likely underlying cause?
A) Bacterial pericarditis
,B) Uremic pericarditis
C) Lupus pericarditis
D) Post-MI pericarditis
Answer: C) Lupus pericarditis
Rationale: Pericarditis is a common manifestation of SLE, particularly in
young women, and can present with pericardial effusion.
3. A 6-month-old infant presents with failure to thrive, recurrent
respiratory infections, and a history of watery diarrhea since birth.
Physical exam reveals poor weight gain and muscle wasting. Which of
the following is the most likely diagnosis?
A) Cystic fibrosis
B) Celiac disease
C) Congenital sucrase-isomaltase deficiency
D) Primary immunodeficiency
Answer: A) Cystic fibrosis
Rationale: Failure to thrive, recurrent respiratory infections, and chronic
diarrhea in an infant are classic for cystic fibrosis, which causes
pancreatic insufficiency and pulmonary disease.
4. A 45-year-old man with a history of hypertension presents with
sudden onset of severe, tearing chest pain radiating to his back. His
blood pressure is 180/110 mmHg in the right arm and 130/80 mmHg
in the left arm. Which of the following is the most likely diagnosis?
A) Acute myocardial infarction
B) Pulmonary embolism
C) Aortic dissection
D) Pericarditis
Answer: C) Aortic dissection
,Rationale: Tearing chest pain radiating to the back with asymmetric
blood pressures between arms is classic for aortic dissection.
5. A 30-year-old woman presents with palpitations, heat intolerance,
and weight loss despite increased appetite. On exam, she has a
diffuse, painless goiter and bilateral proptosis. Which of the following
is the most likely diagnosis?
A) Toxic multinodular goiter
B) Graves disease
C) Subacute thyroiditis
D) Hashimoto thyroiditis
Answer: B) Graves disease
Rationale: The combination of hyperthyroidism symptoms, diffuse
goiter, and proptosis is pathognomonic for Graves disease.
6. A 55-year-old man with a 30-pack-year smoking history presents
with a chronic cough, hemoptysis, and weight loss. Chest X-ray shows
a right hilar mass. Which of the following is the most likely diagnosis?
A) Small cell lung cancer
B) Squamous cell carcinoma
C) Adenocarcinoma
D) Bronchial carcinoid
Answer: B) Squamous cell carcinoma
Rationale: Central hilar mass with hemoptysis in a heavy smoker is most
consistent with squamous cell carcinoma of the lung.
7. A 68-year-old woman presents with sudden onset of severe
headache, nausea, and vomiting. She is found to have a blood
pressure of 220/120 mmHg. Neurological exam reveals nuchal rigidity.
A non-contrast head CT shows hyperdense material in the basal
, cisterns. Which of the following is the most likely diagnosis?
A) Ischemic stroke
B) Subarachnoid hemorrhage
C) Epidural hematoma
D) Subdural hematoma
Answer: B) Subarachnoid hemorrhage
Rationale: Sudden severe headache ("thunderclap"), nuchal rigidity, and
hyperdense blood in the basal cisterns on CT are classic for
subarachnoid hemorrhage.
8. A 40-year-old man with a history of intravenous drug use presents
with fever, malaise, and a new heart murmur. Blood cultures are
positive for Gram-positive cocci in clusters. Which of the following is
the most likely diagnosis?
A) Acute rheumatic fever
B) Infective endocarditis
C) Viral myocarditis
D) Pericarditis
Answer: B) Infective endocarditis
Rationale: Fever, new heart murmur, and positive blood cultures in a
patient with IV drug use are classic for infective endocarditis, often
caused by Staphylococcus aureus.
9. A 65-year-old man presents with a 6-month history of progressive
dysphagia, first to solids and now to liquids. He also reports weight
loss and odynophagia. Which of the following is the most likely
diagnosis?
A) Gastroesophageal reflux disease
B) Esophageal stricture
C) Esophageal adenocarcinoma
