(Portland, OR)  --  An elderly Southeast Portland man who suffers from Alzheimer's disease is reported to be missing.  Seventy-year-old John Lloyd Scott was last seen around one o'clock yesterday afternoon when relatives dropped him off at the Holgate MAX platform.  Scott was on his way to Clackamas Town Center, but called family around eleven o'clock last night to tell them he had gotten lost "near the bike trail."  Scott is described as white, five-feet-seven, with a thin build and gray hair, last seen wearing a blue windbreaker with white stripes on the sleeves, black pants, and a hat.