Can a Fibroadenoma be hard and immovable?

I went to see a breast surgeon who just wants to remove the darn lump but he mentioned he can't be sure it could be a fibroadenoma. From everything I read those are soft and movable but my lump is hard and immovable. Just wondering if it's still possible it's benign although it does not move?

[Cleveland Clinic]

Dear gingerpmoore:  Fibroadenomas look pretty distinct on mammogram and ultrasound but the only way to be certain is with biopsy.  Removing the lump is often done if it is bothersome.  

[weety911]

I found what was thought to be a fibroadenoma in my breast while breastfeeding my baby.  It was hard, felt like a small bean, and mobile. A mammogram and ultrasound was done, and the attending physician was pretty sure it was just a fibroadenoma, but said that she couldn't be 100% sure without a biopsy.  Well, it turned out to be a cancerous tumor.  She was as surprised as I was, I think.  She seemed to think it was pretty textbook for fibroadenoma, especially since I was young and breastfeeding at the time.  Don't take any chances--have it at least biopsied.  Then you will know for sure.