Yanping Li
Tanzania
Case Report
Granular Cell Tumor of the Breast: A Case Report
Author(s): Garrett Fiscus, Naomi Wiens, Brynn Wolff and Yanping LiGarrett Fiscus, Naomi Wiens, Brynn Wolff and Yanping Li
Granular cell tumor (GCT) is a rare benign soft tissue neoplasm of neural origin occurring virtually any body site, breast localization accounting for between 5% and 15% of all cases. Clinically and radiologically, GCTs display similar signs of malignancy with carcinoma, hindering the ability of a confident diagnosis. GCTs show a distinctive histological pattern of granular eosinophilic cytoplasm with S100 positivity.
We report the case of a 67-year-old woman who presented with a painful palpable mass in her left axillary tail for over 30 years. Mammography and ultrasound revealed a 15-mm, ill-defined hypoechoic area with shadowing and vascularity within her left axillary tail. Excisional biopsy was performed and postoperative histological examination with immunohistochemical staining confirmed the diagnosis of a granular cell tumor.
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