
A teen from Canada experienced a dramatic, rapid increase in breast size after receiving two shots of the Pfizer COVID vaccination, a recent case report revealed.
The unidentified 19-year-old had a tingling sensation in her breasts and noticed that they grew from a size B within a week of receiving her first dose in September 2022, with further growth to a triple G within six months after receiving the second shot. Researchers have identified her condition as Pseudoangiomatous stromal hyperplasia (PASH)-associated gigantomastia, an "exceedingly rare" condition linked to COVID-19 vaccination.