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Mucinous Carcinoma
Mucinous carcinoma (also known as colloid) is a type of invasive ductal carcinoma (IDC). Its distinguishing feature is mucous production. Within the mucous are cancerous cells that are often poorly differentiated, which means that the cells look less like normal cells than well-defined ones.
This type of breast cancer accounts for no more than 3% of all breast cancer diagnoses and occurs most frequently in women in their 60s. Most often, mucinous carcinoma is characterized by tumors that can be felt. It tends to be highly estrogen dependent, HER2/neu negative and seldom involves lymph nodes.
Although mucinous carcinomas can grow very large, women with this diagnosis have a ten-year survival rate of more than 90%.