<unk>  is a type of cancer that arises from epithelial cells; these line certain internal organs and skin, and produce mucin (the main component of mucus). Over 40 percent of all<unk> s are colorectal. When found within the skin,<unk>  is commonly a round, elevated, reddish, and sometimes ulcerated mass, usually located on the head and neck. File:Histopathology of<unk>  invasive ductal carcinoma of the breast.Mucinous carcinoma of the breast: Gross pathology (upper left) of<unk>  shows gelatinous areas. Histopathology shows clusters or nests of tumor cells floating in pools of extracellular mucin.
Mucinous carcinoma
Verrucous carcinoma
Adenosquamous carcinoma
Adenosarcoma
Anaplastic carcinoma
Adenocarcinoma
Basal-like carcinoma
Mucoepidermoid carcinoma