18 Amary Amary MF MF Pauwels Pauwels P P Meulemans Meulemans E E Detection of beta-catenin mutations in paraffin-embedded sporadic desmoid-type fibromatosis by mutation-specific restriction enzyme digestion (MSRED): an ancillary diagnostic tool Detection of beta-catenin mutations in paraffin-embedded sporadic desmoid-type fibromatosis by mutation-specific restriction enzyme digestion (MSRED): an ancillary diagnostic tool Am J Surg Pathol. This evidence concerns the gene CTNNB1 and desmoid tumor.