VIDEO footage taken deep in the remote Tarkine wilderness in Tasmania suggests a deadly facial cancer has infected the Tasmanian devil's last healthy, wild stronghold.

A devil with a lump on its left cheek was filmed as it gnawed at a carcass.

Health scare ... Tasmania devils.

The camera was placed inside a mining lease by environmentalists from the group Code Green who oppose development of a big open cut mine at Mount Lindsay, about 80 kilometres south-west of Burnie.

The consultant vet Colette Harmsen said the lesion on the devil's face looked ''very suspiciously'' like devil facial tumour disease, but only pathology would establish it for certain.