I guess it's not really strange, but I had a hedgehog when I was in high school. Her name was Hemi. When she was about 1.5 years old, one of her front legs began to swell at the joint. It didn't seem to bother her, but it gradually turned her paw toward the inside. The vet x-rayed it and found that there was a big black spot on the bone in her leg, which signalled a sarcoma of some type. Since she didn't favor it at all and it didn't seem to bother her daily life, we opted to just leave it and make that final decision once the cancer grew enough to bother her. Because she went for regular check ups and stuff and sedating a hedgehog often isn't always a good idea, I got this bright idea to teach her tricks. The vet told me hedgehogs weren't smart enough to learn tricks like dogs, but imagine her surprise when I showed up with Hemi for a routine check up and I told her, "Hemi, give paw" and my hedgehog stuck out her swollen paw. Then I put her on the little table they used for x-raying and say, "Hemi, play dead". The vet couldn't believe that the little animal suddenly stopped moving, laid completely still and didn't move a single muscle until the x-ray was done and I said, "okay, Hemi, you're good!" The most interested part though... after about 6 months of monitoring this spot, the vet put her on this drug called ChlorPalm, which is basically some strong medication that is safe for animals, but can cause problems in humans. I was instructed to wear gloves while handling it, because it destroys white blood cells in humans. After a 2 or 3 week round of this medication, I took Hemi back for a check up and the black spot on her bone was gone. Her paw remained turned in for the rest of her life, but the swelling went away and there was never another sign of cancer. The vet actually wrote into a vet journal about it, or so I'm told. Another story with another hedgehog. They're prone to tumors and I had this one hedgehog, Nova, who developed a huge oral tumor. It grew very large, very quickly, deformed her face and made eating impossible. Drugs didn't help. Because of it's proximity to her eyes, nasal passages and brain, removing it was impossible unless I also wanted to remove her lower jaw. I didn't want her to suffer, so I made the call to have her euthanized. The vet was giving her the final examination while the tech was getting the sedation and euthanasia drugs ready. As the vet was poking around her mouth, the entire kidney bean sized tumor popped out and fell on the table, followed by a massive amount of blood. After we cleaned her up, the vet gathered up the growth and sent it away to Guelph (from Alberta) for more testing and I took Nova home with me. We got news about a week later that the tumor was horribly cancerous, but seemed to be completely contained in the tumor itself. I don't know how they knew that, but the vet seemed confident in the fact that they knew what they were talking about. Here is a photo of the tumor that fell out of her face. Here is a picture of Nova directly after the tumor just fell out of her face. As you can see, there's a little stretch to the skin, but she was no worse for the wear.