This is a report of a paratubal adult granulosa cell tumor (GCT) located within the right broad ligament in a 62-year-old woman. These are rare tumors with only 8 cases reported so far. Because of an overlap of topographic, morphologic, and immunohistochemical features, it is not always possible to differentiate between the broad ligament GCT and female adnexal tumor of probable Wolffian origin (FATWO). Although nuclear grooving is not an exclusive feature of GCT and can be seen in a variety of other neoplasms, in the context of the differential diagnosis between broad ligament GCT and FATWO, the presence of this feature may be very useful in establishing the diagnosis of broad ligament GCT.
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