Thanks everyone! I'm sad to hear that some have lost cats that way, or that others have indeed been diagnosed with cancer.

As far as Luna goes, I'm really worried about the whole thing. So far, it's more swollen tissue than a lump on her shoulder, so I hope it's just a reaction - but from what I've read, these reactions might cause cancer sooner or later!

I will really think about the necessity of annual shots 'cause Luna is kept indoors, but I wanted to have it done this year because of the new kitten I planned to get, and I wanted Luna to be protected. But I think as soon as the new kitten has settled in and turned out to be healthy, I won't have them vaccined EVERY year.

And as far as I know, vets in Germany ALWAYS inject at the shoulderblades or between them! It doesn't look like the danger of developing vaccine sarcomas is taken very serious here yet.

Lerah021399 , I don't think you have to worry about Ali, 'cause as far as I know, the tumors are caused by vaccines against rabies and feline leukemia.

BTW, I have just found this link, sound like good info to me:
http://www.geocities.com/jillbethany...esarcomas.html

Kirsten