Mutation status of GNAS1 exon 8 was analyzed in one hundred thirty-five formalin-fixed, paraffin-embedded (FFPE) gastrointestinal tumor samples including 45 tubular-villous adenomas, 11 tubular adenomas, 6 villousadenomas, 10 hyperplastic gastric polyps, 31 GEP-NETs and 32 colorectal adenocarcinomas by using polymerase chain reaction (PCR) and direct sequencing.
C0236048
Polyposis, Gastric