Police are becoming increasingly concerned for the welfare of a 40-year-old man who has been missing since Tuesday (July 10).
David Hargreaves was last seen leaving the Royal Preston Hospital at around 7.45am.
He is believed to have links to the Preston, Leyland and Blackburn areas.
A spokesman for Preston police said: "David left the hospital prior to receiving medical treatment and has not been seen since.
"If you know his whereabouts or have any information please contact 101 quoting log reference number LC-20180710-0373."