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What are the risk factors?

A risk factor is anything that increases your chance of developing cancer. CUP can have many different risk factors but without knowing where the cancer started,  it’s difficult to be specific.

Examples of things that can increase a person’s risk of developing cancer are getting older, eating an unhealthy diet, smoking, not being physically active, drinking too much alcohol, spending too much time in the sun, a family history of cancer, and being overweight. Some of these things you can change and others you can’t. These risk factors may play a role in some but not all cases of CUP.

Featured resources

Cancer of Unknown Primary - Your guide to best cancer care

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This information is reviewed by

This information was last updated September 2022 by the following expert content reviewers: Prof Chris Karapetis, Network Clinical Director (Cancer Services), Southern Adelaide Local Health Network, Head, Department of Medical Oncology, and Director, Clinical Research in Medical Oncology, Flinders Medical Centre and Flinders University, SA; Dr Amey Aurangabadkar, Radiologist, Illawarra Radiology Group, NSW; Clare Brophy, Consumer; Prof Katherine Clark, Clinical Director of Palliative Care, NSLHD Supportive and Palliative Care Network, Northern Sydney Cancer Centre, Royal North Shore Hospital, NSW; Prof Wendy Cooper, Senior Staff Specialist, Tissue Pathology and Diagnostic Oncology, NSW Health Pathology, Royal Prince Alfred Hospital, NSW; A/Prof Richard Gallagher, Head and Neck Surgeon, Director of Cancer Services and Head and Neck Cancer Services, St Vincent’s Health Network, NSW; Dr Chloe Georgiou, Oncology Research Fellow, Australian Rare Cancer Portal, and Oncology Trials Fellow, Bendigo Health Cancer Centre, VIC; Dr Susan Harden, Radiation Oncologist, Peter MacCallum Cancer Centre, VIC; Justin Hargreaves, Medical Oncology Nurse Practitioner, Bendigo Health Cancer Centre, VIC; Dr Laura Kirsten, Principal Clinical Psychologist, Nepean Cancer Care Centre, NSW; Prof Linda Mileshkin, Medical Oncologist, Peter MacCallum Cancer Centre, VIC; Caitriona Nienaber, 13 11 20 Consultant, Cancer Council WA.