Hi @Sister, I’m sorry to hear about your friend’s relative. Paget’s Disease of the nipple is very uncommon and getting a diagnosis is a positive step as it can be delayed due to misdiagnosis. There is a brief explanation on the BCNA website - understanding breast cancer - types of breast cancer. There is additional information on
https://www.breastcancercare.org.uk/information-support/facing-breast-cancer/diagnosed-breast-cancer/primary-breast-cancer/pagets-disease-breast This is UK based info but reliable and comprehensive source. Investigation and treatment follows the usual pathway for early breast cancer. Please let your friend know they can contact BCNA to get information, resources and support. Hope that is of some help. Rosie