A teen with a pituitary tumor also had extra breast tissue under her arms
Original title: A rare case of bilateral axillary accessory breast tissue coexisting with prolactinoma in an adolescent girl.
How far along is this research?
- Lab cells
- Animals
- Review
- Tested in people
This was tested in people. That is the most reliable kind of research we share.
This is a report about one patient, not a treatment being tested.
The short version
Doctors report one girl who had a small pituitary tumor and also grew extra breast tissue in both armpits.
What was studied. This is a report about one patient. She was a 15-year-old girl with a prolactinoma, which is a tumor in the pituitary gland. She was taking a medicine called cabergoline.
What they found. She came in with tender lumps under both arms. The lumps had been there for a week. An ultrasound scan and then surgery to remove the lumps showed they were extra breast tissue, not something else. The authors say this is the first report of these two things happening together in a teenage girl.
What this means, and what it doesn't
What it could mean: Extra breast tissue under the arm is rare in teens, but it can happen. The authors say it may show up more during puberty, or when prolactin levels are high. Knowing this can help doctors avoid extra tests or procedures that are not needed. If you or your child has a prolactinoma and finds a new lump, it is worth telling the care team.
What it doesn't mean: This is a report about a single patient. It is not a study, and it is not a treatment. One person's experience cannot tell us how often this happens, or what it means for anyone else. Nothing here is a new therapy, and it is not a cure for anything. It is a reminder for doctors to look carefully, not a change in care you should ask for.
Source: PubMed, June 26, 2026 · Read the original
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