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Going to extremes: determinants of extraordinary response and survival in patients with cancer

Abstract

Research into factors affecting treatment response or survival in patients with cancer frequently involves cohorts that span the most common range of clinical outcomes, as such patients are most readily available for study. However, attention has turned to highly unusual patients who have exceptionally favourable or atypically poor responses to treatment and/or overall survival, with the expectation that patients at the extremes may provide insights that could ultimately improve the outcome of individuals with more typical disease trajectories. While clinicians can often recount surprising patients whose clinical journey was very unusual, given known clinical characteristics and prognostic indicators, there is a lack of consensus among researchers on how best to define exceptional patients, and little has been proposed for the optimal design of studies to identify factors that dictate unusual outcome. In this Opinion article, we review different approaches to identifying exceptional patients with cancer and possible study designs to investigate extraordinary clinical outcomes. We discuss pitfalls with finding these rare patients, including challenges associated with accrual of patients across different treatment centres and time periods. We describe recent molecular and immunological factors that have been identified as contributing to unusual patient outcome and make recommendations for future studies on these intriguing patients.

Type Journal
ISBN 1474-175x
Authors Saner, F. A. M.; Herschtal, A.; Nelson, B. H.; deFazio, A.; Goode, E. L.; Ramus, S. J.; Pandey, A.; Beach, J. A.; Fereday, S.; Berchuck, A.; Lheureux, S.; Pearce, C. L.; Pharoah, P. D.; Pike, M. C.; Garsed, D. W.; Bowtell, D. D. L.
Publisher Name NATURE REVIEWS CANCER
Published Date 2019-06-30
Published Volume 19
Published Issue 6
Published Pages 339-348
Status Published in-print
DOI 10.1038/s41568-019-0145-5