For example, a cyst, infection or fatty growth may feel soft to the touch. However, fibroadenomas and cancerous tumors may feel hard and immobile. Some people may experience pain with an armpit lump.

Phyllodes tumors, are rare breast tumors made up of stromal and epithelial tissues, and are fibroepithelial neoplasms known for fast growth and recurrence. They are classified into benign ...