Should I be worried?

Mummy is worried about me, she has noticed a lump in my ruff and ,having just read some blog posts about a cat called Booie who got a lump under her arm which turned out to be cancer, she is worried that I might have cancer too. This lump doesn't hurt me but then neither did Booie's, so I guess we will be visiting the vet as soon as Mummy can afford it. I'm not worried, sure it gets in the way sometimes but it is also useful as a pillow! I love my Mummy and so long as she keeps cuddling me I'm not too worried about anything, however if there are any other Bunnies out there who have and advice we would appreciate it.