Along with eggs, I've used previously unopened sour cream WAY (, way) past the date and do the same as you once it's opened. Between the pasteurization of the original milk and then innoculation with good microbes, the lower moisture content and the acidity, it's not a very hospitable environment for pathogens.
Cauterization definition, to burn with a hot iron, electric current, fire, or a caustic, especially for curative purposes; treat with a cautery. See more. Dictionary.com
Curettage and cautery. Curettage and cautery (one type of electrosurgery) is a procedure in which your dermatologist scrapes off a skin lesion and applies heat to the skin surface. Your dermatologist will explain to you why your skin lesion needs treatment and the procedure involved.