Trump has set the internet ablaze after claiming Joe Biden has "Stage 9 cancer", a medical impossibility that immediately triggered a storm of confusion, memes and serious national concern. The viral mix-up came as Trump appeared to confuse Biden’s Gleason 9 score, a measure of prostate cancer aggressiveness with a fictional cancer staging system. As the online firestorm spreads, medical experts are stepping in to correct misinformation and clarify Biden’s actual condition. WATCH