• TP53: no TP53 mutations were present in PanNETs.
Germline mutations
• The discovery of germline deleterious mutations in MUTYH and BRCA2 prompted us to screen the germlines of all patients for mutations in DNA damage repair genes or genes associated with hereditary syndromes.
• This mutational signature or pattern of biallelic MUTYH inactivation was not observed in 100 pancreatic ductal adenocarcinomas.
Mutational mechanisms in PanNET
low grade (G1), intermediate grade (G2), high grade (G3) • G3 tumours are invariably lethal •90% of PanNETs are grade G1 or G2
PanNETs
• PanNETs: sporadic, three hereditary syndromes: multiple endocrine neoplasia type 1 (MEN-1), von Hippel-Lindau syndrome (VHL), and occasionally tuberous sclerosis complex (TSC)
• Germline mutations: