NCI Definition: 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. [1]

Disease Details

Borderline Ovarian Clear Cell Neoplasm
Ovarian Clear Cell Tumor
OncoTree Name
Clear Cell Borderline Ovarian Tumor
OncoTree Code


1. National Cancer Institute. NCI Thesaurus Version 18.11d. https://ncit.nci.nih.gov/ncitbrowser/ [2018-08-28]. [2018-09-21].

2. The AACR Project GENIE Consortium. AACR Project GENIE: powering precision medicine through an international consortium. Cancer Discovery. 2017;7(8):818-831. Dataset Version 6. This dataset does not represent the totality of the genetic landscape; see paper for more information.

3. All assertions and clinical trial landscape data are curated from primary sources. You can read more about the curation process here.