UPDATE: A teenage boy has been found, two days after he went missing from Brisbane's Lady Cilento Hospital.
Police say the 16 year old has been returned to the hospital for treatment.
EARLIER: Police are urgently working to find a 16-year-old boy from New South Wales, who's gone missing from the Lady Cilento Children's Hospital.
The 16 year old was last seen at 6pm on Wednesday night and may be travelling to Southbank Parklands with a rainbow coloured scooter.
Police and his family hold serious concerns has he suffers with a medical condition and doesn't know the Brisbane area well.
He's described as Caucasian, 155cm tall, slim build with brown hair and brown eyes. He was last seen wearing a black baseball cap, pink shirt and tan-coloured pants.
If anyone sees the boy or has information on his whereabouts, call Policelink on 131 444.