CGA and ulcerative colitis: In the same way, recent studies have evaluated CgA as a valuable biomarker in various stressful diseases, including neuroendocrine tumors,37 cardiovascular disorders,38,39 atopic dermatitis,40 ulcerative colitis,41 and diabetes mellitus.42 Nickel et al. also reported that CgA levels have been shown to increase after running a marathon.