• A smooth, solid or cystic fibroepithelial (FIBROEPITHELIAL NEOPLASMS) tumor, usually found in the OVARIES but can also be found in the adnexal region and the KIDNEYS. It consists of a fibrous stroma with nests of epithelial cells that sometimes resemble the transitional cells lining the urinary bladder. Brenner tumors generally are benign and asymptomatic. Malignant Brenner tumors have been reported.
  NLM Medical Subject Headings
  U.S. National Library of Medicine, 2025
• A tumor composed of solid and cystic nests of neoplastic urothelial-type cells in an abundant stromal component that is dense and fibroblastic in nature. It arises from the ovary and very rarely the paratesticular structures. It includes benign Brenner tumor, borderline Brenner tumor, and malignant Brenner tumor.
  NCI
  U.S. National Cancer Institute, 2021
• Brenner tumor of the ovary is a solid, abnormal growth (tumor) on the ovary. Most Brenner tumors are not cancerous (benign). About 5% of Brenner tumors are cancerous (malignant) or have a small chance of spreading beyond its original location (borderline). These tumors most often occur in women after menopause. They usually do not cause...
  NIH Genetic and Rare Diseases
  National Center for Advancing Translational Sciences