AUTHOR=Fernandes Vieira Victor , Vo Quoc Duy , Bouquet de la Jolinière Jean , Khomsi Fathi , Feki Anis , Hoogewoud Henri-Marcel TITLE=Granulocytic Sarcoma Presenting as a Palpable Breast Lump JOURNAL=Frontiers in Surgery VOLUME=Volume 3 - 2016 YEAR=2017 URL=https://www.frontiersin.org/journals/surgery/articles/10.3389/fsurg.2016.00067 DOI=10.3389/fsurg.2016.00067 ISSN=2296-875X ABSTRACT=ABSTRACT: We report the case of a 45-year-old woman who palpated a voluminous painless lump in the superior outer quadrant of her left breast. Her past medical history revealed an acute myeloid leukemia treated and considered in remission 1 month prior to this discovery. Imaging work-up by mammogram, US and MRI showed multiples masses suspect of malignancy in both breasts. US-guided needle biopsy was performed in the palpable mass and in one of the multiple lesions located in the right breast. Histologic findings were compatible with a granulocytic sarcoma in both breasts which was considered as a relapse of the acute myeloid leukemia treated a few months earlier.