When a Philadelphia teacher experienced stomach problems, she chalked it up to acid reflux. But as it turns out, that reflux led to a condition called Barrett’s esophagus, which caused pre-cancerous cells to develop in her digestive system.
https://www.news8000.com/health/medical-breakthroughs-new-tool-to-diagnose-barrett-s-esophagus/778736221
Medical Breakthroughs – New tool to diagnose Barrett's esophagus