Thousands of patients are facing advanced cancer diagnoses due to pandemic-related delays, with medical experts warning of a “shadow” wave of recurrent cases. Research from the World Health Organisation’s International Agency for Research on Cancer indicates that over 55,000 cancer cases went undiagnosed across seven nations—including Britain, Australia, and Canada—during the first nine months of 2020. This diagnostic gap has led to more complex, late-stage presentations that are significantly harder to treat.
Why are cancer diagnoses being delayed?
Diagnostic gaps emerged as global health systems struggled with pandemic lockdowns and patients avoided medical facilities. According to the Victorian Cancer Registry, between 2020 and the end of 2023, approximately 4,000 fewer women and 3,500 fewer men were diagnosed with cancer in Victoria than statistical models predicted.
Professor Sue Evans, director of the Victorian Cancer Registry, notes that while screening services were disrupted, many individuals intentionally delayed check-ups to avoid burdening an already strained healthcare system. Data analytics from the registry suggest the community has yet to “catch up” on these missed screenings, leaving a significant number of cases still undetected.
Diagnostic rates for melanoma and rectum cancers were among the most impacted during the pandemic, with Australia trailing predicted figures by 11% and 10% respectively.
What are the long-term clinical consequences?
The shift toward late-stage diagnosis is changing how oncologists approach treatment. Dr. Cameron McLaren, a Melbourne-based oncologist, observed a surge in stage 3 bowel cancer diagnoses between 2022 and 2023. These cases often require more invasive interventions compared to cancers caught at earlier stages.
Professor Declan Murphy, a urologist at Peter MacCallum and Epworth Healthcare, is currently treating patients whose outcomes have been altered by delayed testing. In one instance, a patient’s prostate-specific antigen (PSA) reading climbed from 5.1 in 2019 to 60 by 2023 after missing routine check-ups. Professor Murphy warns that these patients, who might have been treated with localized surgery or radiation in 2020, now face metastatic disease where a cure is significantly less likely.
The patient experience: A case of missed screenings
Cheryl Priest, a 64-year-old from Melbourne’s north-east, provides a firsthand look at the trauma of pandemic-era diagnosis. After skipping two years of routine blood checks, Priest was diagnosed with pancreatic and lung cancer in 2021.
Her treatment involved a 12-hour surgery and six months of chemotherapy. While Priest is currently in remission, she continues to manage long-term health complications, including type 1 diabetes and nerve damage in her fingers. She remains vocal about the mental toll, noting that the experience of navigating treatment during lockdowns—watching fellow patients pass away in nearby hospital wards—left a lasting impact.
Pro Tips for Early Detection
- Monitor changes: If you notice new spots, persistent discomfort, or any physical changes that deviate from your normal, seek a GP consultation immediately.
- Maintain routine checks: Do not skip blood work or scheduled screenings, even if health services appear busy.
- Advocate for yourself: If you missed a screening window during the past few years, schedule a catch-up appointment with your doctor as soon as possible.
Frequently Asked Questions
Is the “missing” cancer backlog cleared?
No. According to Luc te Marvelde of the Victorian Cancer Registry, despite a rise in diagnoses post-pandemic, there is no evidence that the community has fully caught up on the backlog of undiagnosed cases.
Why does a delayed melanoma diagnosis matter?
Professor Anne Cust of the Daffodil Centre explains that delays lead to thicker melanomas. While these can often be treated successfully, they frequently require more extensive surgery, skin grafts, or immunotherapy compared to early-stage removals.
What is the “echoing effect” of the pandemic?
Oncologists like Dr. Cameron McLaren warn that we should expect multiple waves of recurrent cancers. Because many patients presented at later stages, the likelihood of recurrence is statistically higher than it would have been with timely intervention.
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