Gross Anatomy USMLE Step 1 Practice Question
A 62-year-old male presents with productive cough and fever. Vital signs show temperature 38.9°C, heart rate 98/min, respiratory rate 22/min, and blood pressure 138/88 mmHg. Chest x-ray reveals right middle lobar consolidation bounded by sharp, intersecting straight lines superiorly and inferiorly. Laboratory studies show elevated WBC at 14,200/μL. He denies pleuritic chest pain. The radiographic lines correspond to which anatomic structures?
Answer choices
- ATransverse fissure above and diaphragm below
- BDiaphragm above and oblique fissure below
- CTransverse fissure above and oblique fissure belowCorrect answer
- DOblique fissure above and transverse fissure below
- EOblique fissure above and breast shadow below
- FCardiac silhouette above and oblique fissure below
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