hods/Design: Supportive Cancer Care Networkers (SCAN) is a prospective randomized controlled trial conducted in eight large and middle-sized German cancer centers and municipal hospitals. The target population is adults with colorectal cancer UICC I-III after initial R-0 resection scheduled for adjuvant chemotherapy or guideline-based aftercare only. 370 patients will be randomly assigned to either intervention or control group. Patients in the intervention group will receive an additional support by specialized oncology nurses for eight weeks after discharge from hospital by telephone, consisting of symptom monitoring, counselling on self-assessment and self-management and dealing with individual resources for coping and psychosocial well-being. The primary endpoint will be health-related quality of life (HRQoL) at eight weeks after discharge from the initial treating hospital.