ARID1A and ovarian carcinoma: Previous studies have implemented useful immuno-histochemical algorithms with antibodies to distinguish between ovarian carcinoma histotypes with 90% accuracy (e.g. the 8-protein panel p53, p16, PR, WT1, ARID1A, HNF1B, VIM, and TFF3) (20, 22, 23, 25, 26, 30, 49).