Ki values of both CD20-negative (0.43 μL/g/h and 0.92 μL/g/h) and CEA-negative tumours (mdn = 1.97 μL/g/h, interquartile range (IQR) = 1.50–2.39) were higher than zero (see Fig. 3). The gene discussed is CEACAM5; the disease is neoplasm.