Mesothelin showed a median concentration of 2.01 nmol/l (IQR 1.24–4.99 nmol/l) for epithelioid, 2.01 nmol/l (IQR 1.58–4.18 nmol/l) for biphasic, and 0.75 nmol/l (IQR 0.69–1.32 nmol/l) for sarcomatoid mesothelioma (Figure 2A). The gene discussed is MSLN; the disease is mesothelioma.