Table II.

General results.

Examinations	Findings
Blood biochemistry	Blood ammonia, blood lactate and B-type natriuretic peptide negative; renal function, coagulation function, electrolytes, blood glucose, liver function and myocardial enzyme normal
Blood tumor markers	Carbohydrate antigen 19-9, α-fetoprotein, carcinoembryonic antigen and ferrotin normal
Etiology	Three tuberculosis tests, T-SPOT, resist O, respiratory pathogen tests (A and B influenza virus, adenovirus, respiratory syncytial virus, mycoplasma and rhinovirus), Epstein-Barr virus antibody and DNA tests, preoperative infectious diseases screen, pericardial effusion smear and culture, pleural effusion smears and the culture all negative
Rheumatic immunity and connective tissue	Thyroid function, complement C3 and C4, rheumatoid factor, erythrocyte sedimentation rate, lymphocyte immunity somatotype and anti-neutrophil cytoplasmic antibodies all negative. Antinuclear antibody profiles for anti-nRNP/Sm and anti-Sm weakly positive
Imaging	High resolution lung CT revealed inflammation and exudate in both lungs, although mainly in the left lung, and regional compression, expansion and pulmonary insufficiency after drainage of the left pleural effusion; left main bronchus stenosis; blurred fat space and unclear layers in the mediastinum; large accumulation of pericardial effusion. Abdominal CT revealed no obvious abnormality
Heart ultrasound	Large amount of pericardial effusion. Left ventricular systolic function measurement normal

CT, computed tomography; Sm, Smith; nRNP, nuclear ribonucleoprotein.