It tends to occur more often in younger women and is more frequently found in those with BRCA1 gene mutations. Although this breast carcinoma is more frequently found in BRCA 1 gene mutations, most individuals with BRCA 1 gene mutations do not have<unk> .<unk>  is rare and can be seen in about less than 5% of invasive breast cancers. Due to the complicated nature of classification, there are difficulties in subtyping this type of breast cancer.
Medullary breast carcinoma
Mucinous carcinoma of the breast
Adenomyoepithelioma of the breast
Paget's disease of the breast
Hereditary lobular breast cancer
Inflammatory breast cancer
Apocrine gland carcinoma
Bartholin gland carcinoma