Results: In one case, one single node showed micrometastasis, representing an incidence of 2.3 % of the studied cases and 0.23 % of the examined lymph nodes. In three cases benign endosalpingiosis was seen. The patient with MM is alive without evidence of disease 96 months after surgery. ITC were not observed. Conclusion: The frequency of MM in PAN is very low. There are only limited data regarding their prognostic impact within the literature. After careful examination of all removed PAN using H&E-staining (and step sectioning), immunohistochmeical ultrastaging cannot be recommend for routine use.