<unk>  is diagnosed by<unk> amining it under the microscope with consideration of the individual history. In approximately 75% of cases ca<unk>  PAs arise in a<unk>  adenoma that is apparent when the tumour is<unk> cised. In the other approximately 25% of cases the individual had a<unk>  adenoma<unk> cised previously and the diagnosis is made based on (1) the presence of a carcinoma, and (2) the history of a<unk>  adenoma at that location.
Carcinoma ex pleomorphic adenoma
Ductal carcinoma in situ
Mammary-type myofibroblastoma
Invasive carcinoma of no special type
Fibroadenoma
Syringofibroadenoma
Lobular carcinoma in situ
Basal cell adenoma