A 65-year-old woman was diagnosed with stage IB righ t lung cancer. Sheunderwent rightlower lobectomy withlymph node dissection for the cancer. Shedeveloped a milky white pleural effusion of 860 mL, which was drained afterstarting meals on the first postoperative day.
Which pleural effusion test should be performed for a definitive diagnosis?
a. Protein
b. Bacteria
c. Triglyceride
d. Malignant cells
e. White blood cells