This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Breast, Subject name: Pathology
[{'content': 'True about histology in infilterating lobular breast carcinoma: \nSelect and explain. \nA. Single file pattern, B. Pleomorphic cells in sheets, C. Cribriform pattern, D. Pin wheel pattern', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Ans. (a) Single file pattern(Ref: R 9th/pg 1065; 8th/pg 1085)Lobular carcinoma (invasive) of breast-Histologic hallmark: presence of discohesive infiltrating tumor cells as single cells in single file pattern Q, including signet-ring cells Q containing intracytoplasmic mucin droplets Q', 'role': 'assistant'}]