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Deficiencies in germline genetic testing in young-onset colorectal cancer patients
Hannah Ficarino1, Ben Cage2, Jean Paul Osula2
1Department of Surgery, University of Alabama at Birmingham, Birmingham, AL, USA.
Background:
Young-onset colorectal cancer (YO-CRC) patients have high rates of pathologic genetic variants on germline testing, however it is unclear what factors are associated with genetic testing completion.
Methods:
We performed a retrospective review of YO-CRC patients aged ≤50 years between 2014 and 2021 who received the entirety of their cancer care at a single institution. The primary outcome was completion of germline multigene panel testing. Variables were examined for association with germline multigene panel testing.
Results:
Among 100 YO-CRC patients, only 31 % (n = 31) completed genetic testing. Testing rates did not differ by colorectal cancer stage but were significantly higher among patients who received chemotherapy (39.8 % vs 5.9 %; p = 0.01) and in patients with increasing number of relatives with a family history of cancer (p < 0.01).
Conclusions:
Only one-third of YO-CRC patients completed genetic testing. Patients seen by oncology or with increasingly strong family cancer history were more likely to complete genetic testing.
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