Help making a basic but large table in Stata

#1
Thanks for reading :wave:

I am a beginner :confused: and trying to make descriptive tables. I am trying to create an 18x18 cross-table. The 18 variables are disease areas and I would like to see which disease areas are likely to overlap. The 18 variables are set up 0/1 and I would only like the 1s (if they have the disease). The contents of the table should be the number of patients with both, the probability of having both, and the % of patients who have both. I have tried a few things I found online but it always says I have too many variables. THANK YOU!

DISEASE 1 DISEASE 2
Disease 1 number number
probability probability
% %
____________________________________
Disease 2 number number
probability probability
% %