Solid-pseudopapillary tumors of the pancreas are genetically distinct from the pancreatic ductal adenocarcinoms and almost harbor β-catenin mutations. - Abraham,S.C.; Klimstra,D.S.; Wilentz,R.E.; Yeo,C.J.; Conlon,K.; Brennan,M.; Cameron,J.L.; Wu,T.; Hruban,R.H. (Am J Pathol, 2002)