Table 1. Antibodies used.

Antibody	Clone	Titre	Company
Anti-CDX2	CDX-88	1 : 50	Biogenex, San Ramon, CA, USA
Anti-CK7	OVT-TL 12/30	1 : 100	Dako, Carpinteria, CA, USA
Anti-CK20	KS20.8	1 : 4000	Dako, Carpinteria, CA, USA
Anti-EGFR	31G7	1 : 50	Invitrogen, Inc., Carlsbad, CA, USA
Anti-HER2	neu Ab8	1 : 300	Labvision, Inc., Fremont, CA, USA
Anti-MLH-1	G168-15	1 : 25	BD Biosciences, San Jose, CA, USA
Anti-MSH-2	FE11	1 : 100	Calbiochem, Inc., Gibbstown, NJ, USA
Anti-MSH-6	44	1 : 300	BD Biosciences, San Jose, CA, USA
Anti-PMS2	A16-4	1 : 125	BD Biosciences, San Jose, CA, USA
Anti-PTEN	28H6	1 : 100	Novacastra, Bannockburn, IL, USA
Anti-VEGF-A	VEGF A20	1 : 10	Santa Cruz Biotechnology, Santa Cruz, CA, USA

Abbreviations: CDX2=caudal type homeobox transcription factor 2; EGFR=epidermal growth factor receptor; MLH-1=MutL homologue 1; MSH-2=MutS homologue 2; PMS2=post meiotic segregation increased 2; PTEN=phosphatase and tensin homologue mutated on chromosome 10; VEGF-A=vascular endothelial growth factor A.