Yes, long-term untreated acid reflux can lead to esophageal cancer. Occasional heartburn after a heavy meal is common and harmless. The concern is reflux that continues for years. When stomach acid repeatedly washes back into the esophagus, it damages the cells lining...
Colon cancer coming back after ten years is rare, but it does happen. Most recurrences show up within five years of treatment, and only a few patients face late recurrence, when the cancer returns long after they were told they were cancer-free. After a decade in the...