To feed or not to feed

I am in a feeding pickle. I have an adult mouse that appears to have what looks like a growth on its side just under it's front leg. I have no idea what it is but fear its a tumor. The mouse is eating normally and apart from no longer being scared of me it seems normal. Is it safe to feed this mouse to my ball python?

I always say:

when in doubt, throw it out.

Simply not worth the risk to save a dollar or three

Mice & other rodents do get tumors...and with such a short life-span, they show up "quickly" on adult mice that in reality, are "seniors".
On the side of "gross" but most likely harmless to feed.

Can you do it? Yes but the main questions are

Should you do it?

Do you need to do it?

Personally everything with a tumor I humanely dispatch and you has feeder for wildlife (possum, raccoon, vultures etc never turn them down), for my snakes I just have higher standards.

Thanks for the advice. I am not desperate for a feeder mouse and believe the best would be to humanely dispose of the afflicted rodent.