Looking for Cancer

My Neurologist said that this antibody over-production is closely associated with cancer but he was very vague on which type(s), but the Mayo Clinic very specifically lists which ones:

1. Angenocarcinomas (breast, lung, prostate and GI)
2. Small-cell lung carcinoma
3. Thymoma
4. Lymphoma

SOMEHOW, we have ruled something out with blood tests although I do not know which.  In the mean time, I have to do two more major tests: a colonoscopy and a CT scan with contrast.  Today was my consultation with my (original) GI followed by my appointment for the actual colonoscopy next week...in the mean time I apparently have to go get some beverage from the pharmacy which will make me poop myself so I better grab some depends while I'm there...