For one of my sons, for years, rage was his ONLY symptom and we never even though of him as PANDAS....even while we were treating his younger brother for PANDAS. He came with us on a follow-up to Dr. L and she took one look at him (he wasn't even raging at the time) and asked for blood tests and BOOM, his levels on the Cunningham Panel were worse than his brother's!
Oh, yes and at school he is always considered the most polite, pulled together kid around! He gets home and OMG....