Gigantomastia or breast hypertrophy is a rare condition that involves developing extremely large breasts due to excessive breast tissue growth. It affects people assigned female at birth. If you have gigantomastia, you’ll experience rapid and disproportionate breast growth. The speed at which your breasts grow can vary, from over a few weeks to over several years. The tissue is almost always benign (not cancerous).
Gigantomastia is characterized by:
Breasts that have an excess of at least 5 pounds of breast tissue.
Extra breast tissue that equals more than 3% of your total body weight.
