Your question just totally made me think of My Big Fat Greek Wedding...
"All my life I had a lump at the back of my neck. Once I hit the menopause, the lump, it started to grow, from the hormones. I went and had a bios-, bebop-, bebopsy. Inside the lump, the doctor found a teeth and a spinal column. Yes, inside the lump was my twin." I'd want that condition just so I can be like that chick and freak everybody out.
Would you rather die from gluttony or starvation? (Hey, what can I say? It's dinnertime!)