Fine-needle cytological characteristics of carcinoma breast with medullary or medullary-like features masquerading as dendritic reticulum cell sarcoma: An attempt to explore the reasons for erroneous cytologic interpretation

Background: Infiltration of tumors by dendritic reticulum cells (DRC) reflects the host immune defense mechanism. We observed three breast carcinomas cases with dense tumor-infiltrating DRC and lymphocytes in fine-needle aspiration (FNA) smears, leading to cytodiagnosis or differential diagnosis of...

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