Fibroadenomas can be too small to be detected during a physical examination. They are typically painless, even when multiple fibroadenomas are present simultaneously. They are most often identified during self-breast examinations or through radiological imaging methods such as ultrasound. Within the breast, they may feel like a marble, usually round or oval with distinct borders.

To definitively confirm whether a detected breast mass is a fibroadenoma, additional diagnostic tests are required:

* Mammography: An imaging method that uses X-rays to visualize suspicious areas within the breast tissue.
* Breast Ultrasound: Utilizes sound waves to aid in the diagnosis of fibroadenomas.
* Fine Needle Aspiration (FNA): A small sample of cells is extracted from the breast mass using a thin needle for microscopic examination and diagnosis.
* Core Needle Biopsy: A slightly larger needle is used to remove a small tissue sample for more comprehensive pathological analysis and diagnosis.