“…Some PCR reactions of diluted DNA contained none or only one band, although PCR reaction of undiluted DNA always showed two normal bands. PCR products with abnormal mobilities were present in 4, 5, 6, 7, 8, 11, 15th and 16th lanes of the PCR products (from the left) in the case of Turcot patient, but the abnormal bands were not detected in 13 PCR reaction products in the case of HNPCC patient with hMSH2 germline mutation, nor in 16 PCR reactions in the case of HNPCC patient with hMLH1 germline mutation Primers and conditions for PCR, SSCP and direct sequencing in mutation analyses were those previously reported: hMSH3 and hMSH6 (Malkosyan et al, 1996); TGFbRII (Konishi et al, 1996); BAX (Rampino et al, 1997); E2F-4 (Yoshitaka et al, 1996); APC (Groden et al, 1991); p53 (Kikuchi-Yanoshita et al 1992). a As, Astrocytoma; CoAd, Colon adenoma; CoCa, carcinoma.…”