Sheets of uniform population of tumor cells are punctuated by pools of extracellular mucin. If the tumor is not resected intact intraoperatively and there is spillage of mucin, it increases the chances of recurrence. Courtesy of: Dr. Luciano de Souza Queiroz, Dept. of Pathology, Faculty of Medical Sciences, State University of Campinas (UNICAMP), Campinas, São Paulo State, BRAZIL. Additional images are here.