At 45, Chad Dunbar was in great shape, never having smoked, and just finishing a demanding 3,000-mile mountain bike ride. The last thing he expected was to be diagnosed with lung cancer, triggered not by coughing or breathing issues but by unexplained calf pain and swelling. A rare RET gene mutation was identified as the cause, a type known for rapid progression in non-smokers.
By the time Chad sought help, the cancer had spread widely in his body. Targeted therapy gave him hope and improved scans initially, though new mutations made long-term success uncertain. Facing a five-year survival chance of only 5%, Chad chose to live fully, focusing on time with his family.
His story reveals how lung cancer in non-smokers can start with subtle, “silent” signs unrelated to the lungs themselves. It emphasizes the importance of recognizing unusual symptoms and genetic factors that can affect people with no typical risk factors.
