AHIMA RHIA Exam - Topic 4 Question 78 Discussion

A patient is admitted with shortness of breath and hemoptysis. A chest x-ray revealed patchy infiltrates in the left lung and possible pneumonia. On the third day of hospitalization a bronchoscopy with biopsy was done which revealed a small cell carcinoma of the left upper lobe of the lung. A metastatic lesion in the brain was detected. The principal diagnosis is the