Abstract: An antibody specifically binding to BCMA (B-cell maturation antigen) or fragment thereof, including: a heavy chain variable region including a CDR1 region represented by the amino acid sequence of SEQ ID NO: 1, a CDR2 region represented by the amino acid sequence of SEQ ID NO: 2, and a CDR3 region represented by the amino acid sequence of SEQ ID NO: 3; and a light chain variable region including a CDR1 region represented by the amino acid sequence of SEQ ID NO: 4, a CDR2 region represented by the amino acid sequence of SEQ ID NO: 5, and a CDR3 region represented by the amino acid sequence of SEQ ID NO: 6.

Abstract: The present invention relates to a composition for diagnosing lung cancer including a preparation capable of measuring expression levels of lung cancer-specific biomarkers SAA, OPN, and CEA at the same time, a kit for diagnosing lung cancer including the same, and a method of diagnosing lung cancer using the composition. The composition for diagnosing lung cancer has effects such as enhanced sensitivity and specificity as compared to conventional biomarkers, thereby exhibiting high diagnostic efficiency.