Abstract
Background: The pseudopapillary pattern of granulosa cell tumor is rare. Case:We describe a the case of a 35-year-old woman who presented with an initial diagnosis of papillary serous cystadenocarcinoma Results: Evaluation, including immunohistochemistry, led to the diagnosis of pseudopapillary granulosa cell tumor. Conclusion: The pseudopapillary pattern of granulosa cell tumor is rare, and must be suspected in order to utilize appropriate immunohistochemistry and reach the correct diagnosis. Inhibin positivity is particularly helpful.