Brief Summary: Improving Cancer Care Together through eOncoNote is a pragmatic randomized trial involving a secure online eConsultation system (referred to as eOncoNote) that will allow primary care providers and cancer specialist providers to communicate about their patients.

Detailed Description: The overall objectives of this randomized trial are to test an intervention designed to improve coordination/continuity of care between primary care providers (PCPs) and cancer specialist providers (CSPs), and to improve patient experience with regards to patients' perceived continuity of care. Participants will be patients at The Ottawa Hospital Cancer Centre in any one of three phases of the cancer continuum: diagnosis (colorectal, prostate, or lung cancer), active treatment (breast or prostate cancer) or survivorship (breast or colorectal cancer). The intervention involves a secure online eConsultation system that will allow PCPs and CSPs to communicate about their patient. Patients will be randomly allocated to one of two groups: 1) intervention group whereby their PCP and CSP will use a cancer-specific modification of the eConsultation system (eOncoNote) in addition to usual methods of communication or 2) control group receiving usual care (i.e. usual methods of communication such as telephone, fax, mailed consultation letters and progress notes). Randomization and outcomes will be at the level of the individual patient. The primary outcome is patients' perception of team/cross-boundary continuity. Secondary outcomes include measures of patients' anxiety and depression, and patients' experience of the care process. Qualitative methods including interviews with patients, PCPs, CSPs, and cancer system managers will also be conducted.