Table 2 Chromosome 18 and Smad4 analysis by fluorescence in situ hybridisation in oesophageal cell lines.

	CEP 18	smad4 copy No	Translocation	Description of chromosome 18 translocations
C hTRT	2	2	None
Gi hTRT	3	3	None
Go hTRT	4	4	None
OE33	4	2	Yes	2×18, 2× t(18;?)(p10;?)
TE7	3	2	Yes	i(18)(p10), 2×t(18;?)(q10;?)
SEG	2	2	None
BIC	2	1	Yes	del 18, t(18;?)(q10;?)
FLO	4	4	None

CEP 18, centromere 18 probe; t, translocation; I, iso‐chromosome; p, short arm of chromosome; q, long arm of chromosome.