I just quickly skimmed the other comments and saw someone say they didn't think cancers could burst - just wanted to say they can rupture as well as ulcerate. I work at a wildlife rescue and we get a lot of elderly animals that start getting various tumours, both benign and malignant. Most of them pass away from old age before it becomes an issue but in a couple of cases the tumours ruptured or ulcerated, requiring either antibiotic and daily cleaning, or euthanasia, depending on the individual cases.
Just thought that might be handy knowledge for people! :)
Satin Reign aka "Misty"... my life, my love, my everything.