LUNG CANCER MARKER COMPLEMENT C3dg MOLECULE, AND METHOD FOR ANALYZING LUNG CANCER MARKER

摘要

[Problem] To provide a method for detecting early lung cancer, which places lower burden on subjects and has excellent specificity and sensitivity. [Solution] A lung cancer marker comprising a complement C3dg molecule; and a method for analyzing a lung cancer marker, comprising a step of measuring the level of a complement C3dg molecule as a lung cancer marker in a biological sample and acquiring the measured level of the complement C3dg molecule and a step of carrying out an assessment as to whether the measured level is high or low on the basis of a reference level for the complement C3dg molecule. Preferably, the measured level of the complement C3dg molecule is a value relative to a measured level of a complement C3 full-length molecule in the biological sample and the reference level for the complement C3dg molecule is a value relative to a reference level for the complement C3 full-length molecule.