HI,Welcome with your query to HCM.
Based on the facts of your query,you need treatment for Fibroadenosis
,as it has lately shown regression/reduction in size.
Don't think the skin lesion your mother had any connection with the Fibroadenosis ,which is Hormonal
When your doctors who examined it,don't feel it to be a Breast Cancer
As you are obsessed with it being Cancer-I would suggest you to have FNAC Biopsy
Don't worry till the HPR biopsy report comes.
Welcome for any further query in this regard
Will appreciate writing your feedback review comments,to help the needy patients like you at HCM.
Senior Surgical Specialist