Personally, I wouldn't consider an ovarian cyst an infection. But then the ovarian cyst(s) I have lived w/for some 8 or 9 years are simple cysts causing no symptons. The largest is 8 cms, the others are all in the mm sizes last we did an ultrasound to check on them.
Still, I would opt to wait on starting the Humira until a decision is made and action taken in regard to the cyst.