DUCTECTATIC-TYPE MUCINOUS CYSTADENOMA AND CYSTADENOCARCINOMA OF THE HUMAN PANCREAS - A NOVEL CLINICOPATHOLOGICAL ENTITY

A new type of mucinous cystic pancreatic neoplasm is described. The le sions, which have been recognized only recently with the progress of d iagnostic techniques and have not previously been described in the lit erature, are characterized by multilocular cysts with papillary prolif eration of the lining epithelium. They occur exclusively in the head a nd body, predominantly in males, and coexistence of well-differentiate d adenocarcinoma as well as adenoma components is frequently encounter ed. These lesions are quite different from hitherto described mucinous cystic neoplasms of pancreas, not only in terms of gross features but also with regard to intrapancreatic location, and sex and age distrib utions. We propose to classify these lesions as a new pancreatic tumor entity: the ductectatic-type mucinous cystadenoma/cystadenocarcinoma.