Borderline Ovarian Clear Cell Tumor An epithelial neoplasm with low malignant potential affecting the ovary. It is characterized by the presence of clear or hobnail cells. In some cases, the cells may display nuclear atypia and prominent nucleoli. When such cells are present, they remain confined to the glands. There is no evidence of stromal invasion. Borderline Ovarian Clear Cell Neoplasm Borderline Ovarian Clear Cell Tumor Clear cell cystic tumor of borderline malignancy