PAX8 and cervical adenocarcinoma: According to the largest study focusing on this topic, gastric type cervical adenocarcinomas are positive for CK7 in 100% of cases, CK20 in 49%, CDX2 in 51%, Ca125 in 80%, PAX8 in 68%, ER in 6%, PR in 9% and MUC6 in 81% of cases [132].