Aims: The utility of GATA3 immunohistochemistry (IHC) as an aid to the cytological diagnosis of metastatic breast carcinoma in fine needle aspiration (FNA) specimens was investigated. Materials and Methods: Cell block sections from 111 FNA cases of metastatic malignancy were stained for GATA3. including metastases from 43 breast and 44 nonmammary adenocarcinomas. 19 melanomas. https://atlanticknifers.shop/product-category/novelty/