Prayers Please

Fenway, our aging furry boy, is at the vet. This morning I noticed a major swelling along one side of his muzzle from the eye to his nose. Hubby took him in to the vet's office and we were expecting a quick diagnosis of a sinus infection. But hubby returned without him since the vet isn't sure and wanted to x-ray. He said tumors can grow unnoticed for some time then seem to suddenly erupt. So this could be something as simple as an infection that might be easily treated to something life threatening...

Hubby is at work trying to think and I'm at home cleaning and trying not to think.

And we're both waiting.

Update:
Based on the X-ray results, the tentative diagnosis is osteosarcoma (tumor is in the sinus cavity). We have to take him to the local university hospital for possible biopsy/CT to see how treatable the condition is.