Table 1a:

Cytokeratin (CKs) antibodies used in this study with frequency of positivity.

CK antibody used*	No of positive cases	No. of negative cases	Percent of positivity (%)
CK5/6	55	33	63
CK14	53	26	67
AE1/AE3**	40	25	62
CAM5.2	54	30	64
MNF116	44	24	67
34βE12	15	22	41
CK7	33	36	49
CK8	17	10	63
CK18	18	12	60
CK17	9	1	80
CK19	18	26	41

^*The CKs used in this study were not uniformly tested in all cases; different combinations of CKs were used for each case;

^**Each pan-cytokeratin is considered as one CK antibody in this study. Other CKs including CK5, CK20 and panCK were stained in few cases only, so they were not included in this table.