Oesophageal cancer can return even after treatment appears to have cleared it, specialists have warned. A complete response, they say, is not the same as a cure.

A study of 233 patients who had a complete response after chemoradiation and surgery found five-year survival of 59 per cent. Disease-free survival stood at 53 per cent.

Dr Daniela Molena, of Memorial Sloan Kettering Cancer Center, said options become limited once the cancer returns. 'Our best chance here is at the get-go,' she said.

The question matters because surgery carries its own risks. One commentary put significant complications at around 60 per cent, with 30-day mortality approaching 2.5 per cent.

Complete Response Is Not a Cure

A complete response judged before surgery is not the same as one confirmed in tissue afterwards, Dr Molena argued. No clinical tool can predict the second accurately.

Checks used to confirm clearance can miss disease. In the preSANO trial, tumour left behind was missed in 41 per cent of cases.

In the CROSS trial, chemoradiation before surgery produced a confirmed complete response in 29 per cent of patients. Higher response rates do not always mean better disease control.

The SANO trial compared surveillance with immediate surgery in 309 patients who had reached a complete response. Two-year survival was 74 per cent against 71 per cent.

More than a third of those under surveillance kept a complete response, but around half saw the cancer return locally, and 17 per cent developed distant spread.

Where and When It Returns

A study in the Journal of Thoracic Oncology examined 1,147 patients treated with surgery. The cancer came back in 435 of them, or 38 per cent.

Recurrence was most likely soon after treatment. The rate ran at 27 cases per 100 patients a year at first, falling to four by year six.

Distant spread accounted for 55 per cent of returns, with 28 per cent near the original site. The remaining 17 per cent involved both.

Half of all recurrences, 217 cases, were picked up because patients developed symptoms. Another 45 per cent, 194 cases, showed up on routine CT scans.

Only six recurrences, around 1 per cent, were caught by surveillance endoscopy, in which a camera is passed into the oesophagus. Symptoms proved the single biggest route to detection, ahead of any scheduled test.

The chance of recurrence is greatest within two years of treatment, according to the Canadian Cancer Society. Close follow-up is needed throughout this period.

What Follow-Up Care Involves

Many doctors recommend visits every three to six months for the first two years, the American Cancer Society says. These become every six to 12 monthly for three years.

Annual checks follow after that. Visits may include physical examination, blood tests, imaging and endoscopy, with frequency shaped by stage and treatment type.

Surgery and radiation can cause the oesophagus to narrow, a stricture. Regular widening of the oesophagus may be needed so patients can swallow.

Patients are urged to report new symptoms straight away rather than wait for the next appointment. Trouble swallowing and chest pain are named as warning signs.

Severe weight loss and back pain also warrant a call. Such symptoms may signal a return of the cancer, or late side effects of the treatment itself.

Tests used when recurrence is suspected include chest CT scans, endoscopy, bone scans and blood chemistry. Each looks for spread in a different part of the body.

A complete response is not proof the disease has gone for good. Risk remains highest in the first two years after treatment ends.

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Frequently Asked Questions

  • What is a complete response in oesophageal cancer treatment?
    A complete response is when no signs of cancer are detected after treatment, but it does not guarantee the cancer is cured.
  • How often should follow-up care occur after oesophageal cancer treatment?
    Doctors recommend visits every three to six months for the first two years, then six to 12 monthly for three years, followed by annual checks.
  • What are common signs of oesophageal cancer recurrence?
    Common signs include trouble swallowing, chest pain, severe weight loss, and back pain.
  • What tests are used to detect oesophageal cancer recurrence?
    Tests include chest CT scans, endoscopy, bone scans, and blood chemistry.