ITLN1 and Pleural effusion: Moreover, patients with MPM possessed higher omentin levels than patients with lung cancer and pleural effusion; omentin concentration in pleural effusions of patients with MPM (MPM) is about 3000 ng/mL, while in lung cancer (LC), tuberculosis (TB), and pleuropneumonia (PP), the average levels of omentin are about 300, 250 and 650 ng/mL [86], respectively.