A breast lump at age 15 was not found to be cancer until age 19
Original title: Metastatic HER2-positive breast cancer in a 19-year-old woman following a 4-year diagnostic delay: a case report.
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 one patient's story, not a test of a new treatment.
The short version
A young woman's breast lump was treated as an infection for years before doctors found cancer.
What was studied. This is a report about one patient. Doctors wrote up the case of a 19-year-old woman with a large lump in her left breast.
What they found. She first noticed the lump at age 15. Doctors thought it was an abscess, but draining it and giving antibiotics did not help. A biopsy at age 19 showed breast cancer that had already spread to a bone, and at age 21 she had five brain metastases.
What this means, and what it doesn't
What it could mean: A breast lump that does not go away needs a biopsy, even in a teenager. If antibiotics do not work, that is a reason to look again. Her gene tests found no clear inherited cause, so normal gene results do not mean a lump is safe.
What it doesn't mean: This is one person's story, not a study. It does not test a new treatment, and it does not show that any treatment works better. It cannot tell you what will happen to you or to anyone else. It is not a cure and not a promise. Most breast lumps in young people are not cancer.
Source: PubMed, July 30, 2026 · Read the original
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