NBME CBSE 200 QUESTIONS AND ANSWERS USMLE STEP 1 MEDICAL EXAMINATION

NBME CBSE 200 QUESTIONS AND ANSWERS (USMLE STEP 1)MEDICAL EXAMINATION

70yo M dies in a motor vehicle collision. Was undergoing
evaluation for occult blood in the stool. Photo of transverse
colon shown. Dx?
Tubular adenoma. CORRECT ANSWER: Tubular adenoma.
38yo M with 1-week hx of watery, itchy eyes and a runny nose.
Physical shows inflamed nasal mucosa. No congestion in lower
lung. Pharmacotherapy?
Loratadine. CORRECT ANSWER: Loratadine.
16yo girl with 3-day hx of fever, nonproductive cough, and
fatigue. T 38.3, P 88/min, BP 102-70. PE shows pale
conjunctivae. CXR shows bilateral interstitial infiltrates. Blood
spontaneously agglutinates while awaiting transport to the
laboratory. Antibody isotypes causing agglutination?
IgM. CORRECT ANSWER: IgM.
24yo M with small tender blisters on his penis 3 days after
unprotected sex. Photograph shown. Causal agent? 

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