However, when the tumour infiltrate represented higher colonisation (0.08% ± 0.01%) of the pulmonary tissue, as observed in one mouse, a significant diffuse uptake of 99mTc-anti-CEA IgA was detected in the lung (mean value in pulmonary ROI: 1,4 in Figure 7A-7C) but no pulmonary nodule was identified in microSPECT/CT slice, while the imaging resolution was about 1 mm. This evidence concerns the gene CEACAM5 and neoplasm.