Claim: A tumor marker is a biomarker with 42 types corresponding to a variety of associated tumor types. (e.g.. CA15-3 and CA27-29 for breast cancer, Chromogranin for neuroendocrine tumor.)
Evidence: A tumor marker is a biomarker found in blood, urine, or body tissues that can be elevated by the presence of one or more types of cancer. Alpha fetoprotein (AFP) CA15-3 breast cancer CA27-29 breast cancer CA19-9 CA-125 Calcitonin Calretinin Carcinoembryonic antigen CD34 CD99MIC 2 CD117 Chromogranin neuroendocrine tumor Chromosomes 3, 7, 17, and 9p21 Cytokeratin (various types: TPA, TPS, Cyfra21-1) Desmin Epithelial membrane antigen (EMA) Factor VIII, CD31 FL1 Glial fibrillary acidic protein  (GFAP) Gross cystic disease fluid protein (GCDFP-15) hPG80 HMB-45 Human chorionic gonadotropin (hCG) immunoglobulin inhibin keratin (various types) lymphocyte marker (various types MART-1 (Melan-A) Myo D1 muscle-specific actin (MSA) neurofilament neuron-specific enolase (NSE) placental alkaline phosphatase (PLAP) prostate-specific antigen (PSA) PTPRC (CD45) S100 protein smooth muscle actin (SMA) synaptophysin thymidine kinase thyroglobulin (Tg) thyroid transcription factor-1 (TTF-1) Tumor M2-PK vimentin