Why use CEA-Scan if the CEA blood level is not yet drastically elevated?
Over 95% of colorectal cancers, as well as more than 80% of other solid tumors express CEA. Clinical experience has shown that CEA-Scan does localize CEA-expressing tumors in patients with “normal” blood CEA levels. Many patients with known tumor and normal blood CEA levels have tumors that simply don’t shed enough CEA to be detected with today’s blood tests … but there is enough CEA at the cell membrane to be localized with CEA Scan.
