<unk>  (NST) is the most common form of<unk>  breast cancer. It accounts for 55% of breast cancer incidence upon diagnosis, according to statistics from the United States in 2004. On a mammogram, it is usually visualized as a mass with fine spikes radiating from the edges. On physical examination, this lump usually feels much harder or firmer than benign breast lesions such as fibroadenoma. On microscopic examination, the cancerous cells invade and replace the surrounding normal tissues. IDC is divided in several histological subtypes.
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