<unk>  (NST) also known as<unk>  ductal carcinoma or ductal NOS and previously known as<unk>  ductal carcinoma, not otherwise specified (NOS) is a group of breast cancers that do not have the "specific differentiating features". Those that have these features belong to other<unk> s. In this group are: pleomorphic carcinoma, carcinoma with osteoclast-like stromal giant cells, carcinoma with choriocarcinomatous features, and carcinoma with melanotic features. It is a diagnosis of exclusion, which means that for the diagnosis to be made all the other specific<unk> s must be ruled out.
Invasive carcinoma of no special type
Verrucous carcinoma
Basal-like carcinoma
Lymphoepithelioma-like carcinoma
Mucinous carcinoma
Sarcomatoid carcinoma
Ductal carcinoma in situ
Carcinoma ex pleomorphic adenoma