A 19-year-old’s B-cup blossomed to triple G just a week after her first Pfizer COVID-19 shot, leading to a dramatic 7.9-pound reduction mammoplasty. Diagnosed with the rare PASH-linked gigantomastia, this case is one of fewer than 20 worldwide. While New Zealand Health officials deny a direct vaccine link, the story highlights the urgent need for more research and better patient-provider trust. Who knew a needle could spark such a dramatic growth spurt?