Cystic clear cell tumor of borderline malignancy of the ovary lacking fibromatous components: report of two cases and a possible new histological subtype

Abstract

Background: All of the ovarian borderline clear cell tumors ever reported had, without exception, an adenofibromatous pattern.

Case: We report two cases of borderline cystic clear cell tumor of the ovary without apparent invasive lesions or adenofibromatous components.

Conclusion: This is the first report of cystic clear cell tumors of borderline malignancy, indicating a possible new histological subtype.