Fine-Needle Aspiration Cytology of Colloid Carcinoma Breast in Correlation with Histopathology

Fine-needle aspiration biopsy has been routinely used for the diagnosis and management of palpable breast lesions. Colloid carcinoma (pure mucinous carcinoma) is an uncommon variant of breast carcinoma with distinctive cytological and histological features. Although the cytologic features of mucinous carcinoma of the breast in fine-needle aspiration specimens are characteristic, the correlation of these features with the ability of cytologists to definitively identify this tumor has not been well studied. Here, we report a 78-year-old female patient diagnosed on cytology as mucinous carcinoma of the breast and subsequently confirmed by histopathology.