Similarly, in CCA tissue samples, the order was as follows: ARID1A (16/62, 25%), ATM (11/62, 17%), BAP1 (7/62, 11%), BRCA2 (5/62, 11%), BARD1 (5/62, 8%), and several more below 8% frequency. The gene discussed is BRCA2; the disease is cholangiocarcinoma.