Ayşe Nur Uğur Kılınç,Zeynep Bayramoğlu,Yaşar Ünlü,Nergis Aksoy,Mehmet Ali Eryilmaz, Synchronous Bilateral Solid Papillary Carcinoma of Breast: A Rare Case Report Oncology Case Reports 2020 http://dx.doi.org/10.31487/j.OCR.2020.01.01 https://www.sciencerepository.org/synchronous-bilateral-solid-papillary-carcinoma-of-breast_OCR-2020-1-101 Abstract: Background: Solid papillary carcinoma is a rare type of carcinoma that accounts for less than 1% of all breast cancers and mostly seen in postmenopausal women. This report presents a rare case of synchronous bilateral solid papillary carcinoma of the breast. Case Report: A 74-year-old female patient had a mass in her right and left breast. Bilateral total mastectomy and sentinel lymph node biopsy were performed. The pathologic diagnosis was synchronous bilateral solid papillary carcinoma. No lymph node metastasis was detected in either of the breasts. Conclusion: To our knowledge, little is known about simultaneous bilateral solid papillary carcinomas. Solid papillary carcinoma should be kept in mind in the differential diagnosis of bilateral breast masses with neuroendocrine differentiation in elderly patients. Keywords: Bilateral breast carcinoma, solid papillary carcinoma, old age, breast neoplasm, solid papillary neoplasm, bilateral