. "\"Any process that starts the inactive process of necroptosis as a result of a signal outside the cell. Necroptosis is a necrotic cell death process that results from the activation of endogenous cellular processes, such as signaling involving death domain receptors and Toll-like receptors.\" [GOC:BHF, GOC:dph, GOC:tb]" . . "induction of necroptosis by extracellular signals" . .