Single file pattern is seen in breast cancer type?: (A) Intraductal, (B) Infiltrating lobular, (C) Infiltrating ductular, (D) All
Answer is B. Ans. is 'b' i.e. Infiltrating lobular "The hisological hallmark of lobular carcinomas is the pattern of single infiltrating tumor cells, often only one cell in width (in the form of a single file) or in loose clusters or sheets."