le·sion 
(lēzhən)
(lēzhən)n.
Any of various pathological or traumatic changes in a bodily organ or tissue, including tumors, ulcers, sores, and wounds.
tr.v. le·sioned, le·sion·ing, le·sions
To cause a lesion to form on or in.
[Middle English lesioun, from Old French lesion, from Latin laesiō, laesiōn-, from laesus, past participle of laedere, to injure.]