Tuesday, 11 September 2012, 09.30 -10.30 Results: There were 3 women and 2 men with a median age of 60 (range 45-80 years). Symptoms were dominated by abdominal pain, jaundice, vomiting, and alteration of the general condition. Radiologic investigation showed multiloculated cystic mass of the pancreas, associated to splenic thrombosis and bone metastasis in one case. In gross, we received multilocular cysts of 3 to 16 cm in wall, their wall was fibrous, and thick, the internal surface showed many papillary projections and mural nodules. There was no communication with the duct system. On histologic examination, cysts had a fibrous wall lined by mucinous atypical cells showing frank anaplasia, wall's cyst was invaded by anaplastic glands; the stroma was of ovarian type in all cases. Conclusion: PMC are uncommon neoplasia, their diagnosis is based on the histopathologic exam, their diagnosis is better than duct carcinoma and depends on the extent of tumour invasion.