Physical characteristics on examination were as follows: height, 161.5 cm; weight, 51.1 kg; body temperature, 36.7°C; pulse rate, 60/min; BP, 106/82 mm Hg; respiratory rate, 18/min; oxygen saturation, 98% while breathing room air. Oral cavity and neck were not remarkable. Percussion of the thorax revealed an increased resonance over the right lung, where breath sounds were diminished on auscultation. Heart sounds were not remarkable. Laboratory test results showed WBC, 5,300/μL; hemoglobin, 13.1 g/dL; platelets, 191,000/μL; aspartate aminotransferase, 26 U/L; alanine aminotransferase, 18 U/L; BUN, 13.0 mg/dL; creatinine, 0.8 mg/dL; C-reactive protein, 0 mg/dL; and blood sugar, 85 mg/dL.