Table 2. Relationship between the loss of GNG7 expression and the genetic and/or epigenetic alteration in its loci.

	LOH			Hypermethylation
	−	+	NI	−	+
GNG7 expression
T/N<0.8	24	10	0	20	14
0.8<T/N	6	0	2	8	0
P-value			0.0043		0.0065

GNG7=G protein gamma 7; LOH=loss of heterozygosity; T/N=expression ratio of GNG7 between tumour and the corresponding normal tissues.