Volume 224 - Published ahead of Issue 8
Early-Onset Colorectal Cancer With Liver-Only Metastases: A Retrospective Cohort Study Integrating Prospectively Collected Real-World Clinical and Molecular Data From an Australian National Database (2009–2024) to Guide Treatment Planning
Authors: Savio G. Barreto, Christos S. Karapetis, Shahid Ullah, Matthew Burge, Susan Caird, Angus Campbell, Azim Jalali, Ross Jennens, Muhammad A. Khattak, Belinda Lee, Stephanie H. Lim, Shehara Mendis, Louise Nott, Timothy J. Price, Jeremy D. Shapiro, Jeanne Tie, Javier Torres, Colin Williams, Rachel Wong, Vanessa Wong, Peter Gibbs
Correspondence: savio.barreto@sa.gov.au
Correspondence: savio.barreto@flinders.edu.au
Med J Aust 2026 || doi: 10.5694/mja2.70266
Published online: 18 August 2026
Published online: 18 August 2026
Abstract
Objective
To leverage the Treatment of Recurrent and Advanced Colorectal Cancer (TRACC) registry (an Australian cancer database) to explore the ideal timing and sequence of therapies and the factors influencing these decisions in colorectal cancer (CRC) patients with liver-only metastases to inform contemporary decision-making and future trials.
Study Type
Retrospective registry-based cohort study using the TRACC registry.
Setting and Participants
Consecutive patients with liver-only metastatic CRC enrolled in the TRACC registry.
Main Outcome Measures
To explore cancer biology, intended treatment at presentation, actual treatment received and the resultant outcomes for early-onset CRC (EOCRC) (≤ 50 years) and late-onset CRC (LOCRC) (> 50 years) patients with liver-only metastases from a real-world perspective.
Results
Between 14 January 2009 and 2 September 2024, 1691 patients with liver-only metastatic CRC were enrolled in TRACC. These included 276 EOCRC patients (16.3%) and 1415 LOCRC patients (83.7%). In the EOCRC subset, there were more females (48.2% vs. 34.5%, p < 0.001), less comorbidity (Charlson comorbidity index score 0, 90% vs. 59%, p < 0.001), more left-sided primaries (76.1% vs. 65.7%, p < 0.001), more synchronous disease (53.3% vs. 42.1%, p < 0.001) and BRAF V600E mutations (13.9% vs. 8.1%; p = 0.010). Overall, EOCRC patients had a longer median survival compared with LOCRC patients (3.20 vs. 2.38 years, p < 0.001). For the 662 patients (39.1%) undergoing liver resection, median survival was 5.99 years in EOCRC patients and 5.88 years in LOCRC patients. For all patients and for those undergoing resection, respectively, B-Raf proto-oncogene, serine/threonine kinase (BRAF) (hazard ratio, 1.97 [p < 0.001] and hazard ratio, 2.25 [p < 0.001]) and Kirsten rat sarcoma viral oncogene homologue (KRAS) mutations were associated with worse outcomes (hazard ratio, 1.29 [p < 0.001] and hazard ratio, 1.34 [p = 0.003]).
Conclusion
Differences in sex distribution, BRAF mutation rates, primary tumour site and overall survival suggest biological differences between EOCRC and LOCRC. Liver resection was associated with improved survival in LOCRC, with the benefits of all therapies varying depending on age, primary tumour site and whether patients presented with synchronous or metachronous liver-only metastases.
Uneven Ground: Survival Differences Among Victorian Lung Cancer Patients by Location of Residence (2011–2023): A Retrospective Cohort Study
Evangeline Samuel, Eldho Paul, Mike Lloyd, Sanuki Tissera, Craig Underhill, Sagun Parakh, Phillip Parente, Inger Olesen, Javier Torres, Katharine See, Gavin M. Wright, David Langton, Thomas John, Matthew Conron, James Bartlett, Nicola Atkin, Nikolajs Zeps, Susan V. Harden, Wasek Faisal, John R. Zalcberg, Rob G. Stirling
Australian Pathways for Specialist Pain Management and Early Palliative Care for People With Pancreatic Cancer: Developed Using a Community Consensus Approach
Jennifer Philip, Melanie R. Lovell, Kylee Bellingham, Gail Garvey, Gregory B. Crawford, Nicole M. Rankin, Kara Burns, Isabel Young, Vivienne Milch, Dorothy Keefe, Katrina Anderson, James Lawson, Meinir Krishnasamy
Program Guidelines for the National Lung Cancer Screening Program: Targeted Lung Cancer Screening in High-Risk Individuals in Australia
Nicole M. Rankin, Rebecca Zosel, Lisa J. Whop, Raglan Maddox, Annette McWilliams, Miranda Siemienowicz, Jon Emery, Maria A. R. Lantin, Georgia Bartlett, Mikayla Wolfe, Abbey Diaz, Katrina Anderson, Lillian Liu, Cindy Toms, Sarah McDermott, Peter Bligh, Jeremy Chalke, Stephen Melsom, Claire E. Nightingale, Alison Brown, Sam Pope, Julia Brotherton, Anne Fidler, Michel Itel, Mark Brooke, Diane M. Pascoe, Fraser Brims, Tracy L. Leong, Emily Stone, Dorothy Keefe, Vivienne Milch
Beyond Mammography: Sovereignty and Relational Breast Care With Aboriginal and Torres Strait Islander Women
Devaleena Das, Jessica Gildersleeve, Amy Thomson, Aunty Gracelyn Smallwood, Lorelle Holland
Striving for Racial Equity in Oral Cancer Research: A Case Study
Sneha Sethi, Simon Naylor, Catherine Leane (Dharug/Gabrigal), Gail Garvey (Kamilaroi), Joanne Hedges (Yamatji), Lisa M. Jamieson, Nicolas Reid (Dharug/Gabrigal)
Treatment and Survival Outcomes for Indigenous and Non-Indigenous Australians Within the Victorian Lung Cancer Registry: A Retrospective Cross-Sectional Cohort Study
Melanie Wong, Mike Lloyd, Jessie Zeng, Sanuki Tissera, Kalinda E. Griffiths, Justine Clark, Jonathan Gillies, Lisa Briggs, Jacqueline Lesage, Tom Wood, Craig Underhill, Sagun Parakh, Louis B. Irving, Wasek Faisal, Rob Blum, Gary E. Richardson, Phillip Parente, Michelle Caldecott, Inger Olesen, Javier Torres, Evangeline Samuel, Christopher Lyne, Katharine See, David Langton, Thomas John, Gavin Wright, Matthew Conron, James Bartlett, Golsa Adabi, Maggie Moore, Susan Harden, Zoe K. McQuilten, John R. Zalcberg, Rob Stirling