MAD2L2 and clear cell adenocarcinoma: Interestingly, all 49 clear cell carcinoma tissue cases tested positive for REV-7 expression (13 of which exhibited low REV-7 expression and 36 high REV-7 expression), while only 77 out of 88 non-clear cell carcinoma tissues tested positive for REV-7 (41 of which were low REV-7 ones and 47 of which were high REV-7 ones).