Rare Condition Causes Woman to Grow 11 Bra Sizes in a Year; Doctors Gave Her a Wikipedia Page

A rare medical condition that causes uncontrolled breast growth left one Scottish woman without a diagnosis for more than 15 years — and with a Wikipedia printout as her primary source of information when she finally got one.

Summer Robert, 28, was diagnosed with macromastia at age 25. She stands 4 feet 11 inches tall and wears an R-cup bra, having grown 11 bra sizes in the past year. Doctors attribute the rapid growth to hormonal fluctuations common among women in their 20s, though Robert’s body responds with unusual intensity. Medical understanding of the condition remains limited.

Robert said she began seeking medical answers as a young teenager.

“I had been going to the doctors since I was like 14 or 13 years old, and not one of them diagnosed me. No one told me that there was a condition,” she said. “They all just said it was puberty. They all just said I had to lose weight. It was ridiculous.”

At her diagnosis, she said, her doctor “literally printed a Wikipedia page and gave me the Wikipedia page.” Only a small number of physicians are sufficiently familiar with macromastia to identify it and explain it to patients, Robert said.

The condition first made itself apparent when Robert was 8 years old and began wearing a C-cup bra. Growing up in Scotland, she said she endured persistent hypersexualization — catcalling, dress code violations at school and social scrutiny.

“Basically, I go through growth spurts,” she said, explaining the hormonal nature of the changes.

As an adult, Robert said she found self-acceptance through content creation on OnlyFans, which she started roughly two years ago. Still, macromastia shapes her day-to-day life in significant ways.

Clothing is an ongoing challenge. Because of the disproportion between her chest and waist, she relies on garments that are “super stretchy,” she said — and even then, fit is rarely guaranteed.

“Nine times out of 10, it will still not fit,” she said. “It’s just day-to-day things that you would think are so easy — it’s so difficult.”

A back brace is required for virtually any physical activity, Robert said, including extended walking and household tasks. She said joining a gym is not feasible.

She has discussed breast reduction surgery with specialists, who told her results would be temporary.

“We spoke to a breast reduction specialist, and he told me that they’d just come back. He said, ‘If it’s really causing you so much stress, you can definitely get a reduction,'” Robert said.

She anticipates having the procedure eventually but is not rushing the timeline. “They’ll come back, but not super, super fast,” she added, quoting her doctor’s assessment.