Is it possible to have very high CEA and CA19-9 without cancer?

Hi,
My husband was hospitalized with a mild stroke a couple of weeks ago. While admitted, they did a CT scan, which caught just enough of his lungs to show a 1 cm mass. They did a chest CT, which showed a mass in the other lobe (1.6 cm) as well. A year or so after he had pancreatic cancer (6 years ago) there was a fungal infection in his lungs, which we feared was cancer at the time, so we thought this could be more of the same. But, then they ran a CEA with a result of 39.6, followed by a CA19-9 of 3,057. Our small-town hospital can't do a PET, so we had to schedule that after he was discharged. The scan is another 2 weeks out, and as much as I'm trying not to jump to worst case scenario, I fear that the cancer might be back.
I'm posting all this in hoping you know of someone who had high numbers like this and didn't have cancer. I could really use some hope! Thanks