| C-embryonales Antigen (CEA) | Zentrallabor LKH | |
| C-reaktives Protein (CRP) | Zentrallabor LKH | |
| C-reaktives Protein (CRP) (CDK) | Zentrallabor CDK | |
| CA 12-5 Markerprotein | Zentrallabor LKH | |
| CA 15-3 Markerprotein | Zentrallabor LKH | |
| CA 19-9 Markerprotein | Zentrallabor LKH | |
| CA 72-4 Markerprotein | Zentrallabor LKH | |
| Calcitonin | Nuklearmedizin | |
| Cytokeratin-FRG./CYFRA21-1 | Zentrallabor LKH | |