RESUMO
BACKGROUND: Breast carcinomas are very well known to metastasize to the ovary. Hence, it is justified to think of an ovarian mass, in a known case of breast carcinoma, as a metastasis from the same. CASE: A 70-year-old woman underwent ultrasound-guided fine needle aspiration cytology (FNAC) from a unilateral ovarian mass to confirm its nature. Cytosmears were highly cellular and showed cohesive clusters of small to intermediate-sized cells with bland nuclear chromatin and moderate cytoplasm in a background of mucinous material. A unique feature was the presence of microcystic spaces, around which the cells were arranged in an orderly fashion. Only occasional nuclear grooves were seen; however, they were helpful in suggesting the diagnosis of Brenner tumor. The subsequent histopathology specimen confirmed the diagnosis, with an excellent cytohistologic correlation. CONCLUSION: There is very limited experience with the FNAC findings of this tumor, and it is usually a diagnostic dilemma for the cytopathologist. This case highlights certain unique cytomorphologic features that may aid in diagnosis on cytology alone.
