(Vancouver, WA)  --  Vancouver police are looking for a missing woman who's reported to be medically endangered.  Authorities say 74-year-old Sandra Wright was last seen around 5:30 yesterday evening, but she failed to return to a scheduled location to pick up some personal items.  Police say Wright has medical problems and has limited mobility on foot.  She's described as white, average height, weighing 81 pounds, last seen wearing black pants, maroon shirt and a white colored coat, and believed to be driving a white 2007 Toyota Prius with Washington plate 628 YVL.