2 O'Connell O'Connell JT JT Tomlinson Tomlinson JS JS Roberts Roberts AA AA Pseudomyxoma peritonei is a disease of MUC2-expressing goblet cells Pseudomyxoma peritonei is a disease of MUC2-expressing goblet cells Am J Pathol. This evidence concerns the gene MUC2 and pseudomyxoma peritonei.