This observational study will evaluate the use of Avastin (bevacizumab) and conventional chemotherapy in patients >/= 70 years of age with previously untreated metastatic colorectal cancer. Data will be collected from each patient from initiation of treatment until disease progression occurs (minimum follow-up 12 months).

Inclusion Criteria:

• Adult patients, >/ 70 years of age
• Previously untreated metastatic colorectal cancer
• Patient considered suitable to receive chemotherapy with or without Avastin

Exclusion Criteria:

• Participation in any other clinical trial or study with the exception of participation in registries

Patients >/= 70 years of age with previously untreated metastatic colorectal cancer suitable to receive chemotherapy with or without Avastin