In the long struggle against lung adenocarcinoma — a disease that outpaces most treatments and wears down the options available to patients — researchers at Nanchang University have found a quiet kind of hope in an unexpected place: a compound already known to medicine, repurposed and redirected toward a new enemy. 4-hydroxytamoxifen, tested against lung cancer cell lines and living mice, demonstrated a meaningful ability to halt tumor growth by cutting off the metabolic fuel that cancer cells depend on. The work is a reminder that sometimes the answers we need are not entirely new — they are