If you had to choose a cancer to get, which cancer would it be?

You wake to discover you are in a quasi-reality, no one around can hear you and are as dead asleep. The Fairy of The Future tells you that you will be afflicted with an internal cancer in the very near future, but you get to choose which cancer it is, what cancer would it be? By internal, it means liver, lung, stomach, ovarian, etc. (yes, testicular cancer as well).