Abstract
We performed partial mastectomy in a 50-year-old woman with a mass in her right breast. Histological examination revealed tall tumor cells with oval nuclei, increased chromatin, and eosinophilic granules. The tumor cells had a funicular structure with many alveoli, and small glandular, tubular, and rosette-like structures were observed in some sections. Solid alveoli were observed in some small cells, and circulatory stasis was observed in some others. Specific staining revealed many tumor cells to be chromogranin A- and synaptophysin-positive, while Grimelius staining revealed alveoli with clusters of positive cells. The patient was subsequently diagnosed with carcinoid of the breast.
