Not sure what's wrong with this female - I think she may also have a tumour hanging from her belly? Further images here: https://canberra.naturemapr.org/sightings/4594058
https://canberra.naturemapr.org/sightings/4594058
Some years ago there was a male out at Gigerline that had a large tumour hanging off the side of its chest. The tumour was about half the size of a rugby football.
Hi HelenCross, Well I am not a vet and most vets would want lab tests before diagnosing a disease but from the appearance it would be reasonable to start out suspecting 'Lumpy Jaw' aka Oral Necrobacillosus. It mostly occurs in captive animals but also occurs rarely in the wild. It is eventually fatal due to starvation and some degree of sepsis, but can take years. If that is what it is, the condition is effectively untreatable in a wild adult EGK. The best thing that could happen would be a veterinary diagnosis of the live or dead animal, and if it is not oral necrobacillosis, to get tissue samples and photos of the necropsy to Carrie Rose at the Australian Wildlife Disease Centre, located on the Taronga Zoo site in Sydney. But first it would be necessary to find someone local to do the necropsy (I might be able to find someone) and of course to get hands on the animal (again I MAY be able to find someone with a dart gun).
The 'tumour hanging from her belly' might be eversion of the pouch lining which can happen naturally, especially if she has recently had a large py, and is not normally of concern. Alternatively it could be a hernia.