Fibroadenoma is a type of non-cancerous breast tumor. It's a solid lump, and usually feels firm, rubber, and smooth. It can be different shapes and you can easily move it within your breast tissue. You may have one or multiple lumps.
Fibroadenomas are most common in women between ages 15 and 35. Many fibroadenomas don't cause symptoms and don't need treatment. However, you should see a doctor if you have a new breast lump, have other breast changes, or the size of the lump gets much bigger.