A cancer patient being treated in Newcastle has been part of an innovative trial which uses green dye to make tumours glow.
John Barrow, 59, had what he thought was a pulled muscle - but when it didn't heal, friends urged him to get it checked out. The security consultant - who lives in Cumbria but has been travelling to the Freeman hospital for treatment - has stage three bone cancer and had a sarcoma in his leg.
Since then, he has been part of a world-leading trial which is seeing Newcastle medics inject a harmless dye called indocyanine green. The dye causes sarcoma cells to glow under infrared light, but avoids healthy cells.
