In medicine,<unk>  is any<unk> ncer that arises from epithelial cells. It is malignant by definition:<unk> s invade surrounding tissues and organs, and may spread to lymph nodes and distal sites (metastasis).<unk>  in situ (CIS) is a pre-malignant condition, in which cytological signs of malignancy are present, but there is no histological evidence of invasion through the epithelial basement membrane.
Carcinoma
Papilloma
Acinic cell carcinoma
Condyloma
Chondrocalcinosis
Nevus
Platinosis
Colon polyps