Diagnosis Error: Carcinoma or Primary Breast Lymphoma? A Case Report and Literature Review

Introduction: Breast involvement by non-Hodgkin lymphoma is particularly rare in women. We describe the case of a patient with a rapidly growing, nodule in the right breast. On ultrasonography, the nodule was suspicious for breast carcinoma. Case presentation: A breast biopsy from a 73-year-old Moroccan women answered invasive ductal carcinoma grade 3 from Elston and Ellis. Patey was performed. Microscopic examination showed lymphoid proliferation confirmed on immunohistochemical analysis. Our patient was treated with chemotherapy. Conclusions: The rarity of breast lymphomas, and the problems related to the diagnosis and therapeutic choices with these tumors require molecular techniques in association with classical histological diagnosis.