Can uterine cancer cause weight gain?

No, as far as I know there’s no correlation between uterine cancer and weight gain. In fact, unexplained weight loss is sometimes listed as one of the symptoms of uterine cancer. On the other hand, I’ve also read that obesity can be a risk factor for uterine cancer, because high levels of fat in the body also sometimes increase the levels of estrogen. But since you’re asking about does uterine cancer cause weight gain, then I’d say no, there’s no link between uterine cancer and weight gain.

To the contrary and unexplained sudden jump in weight can be caused from uterine cancer.
Bloating is a sign and with bloating comes extra weight.