This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: General anatomy, Subject name: Anatomy
[{'content': 'Which of the following helps in differentiation of follicular carcinoma from follicular adenoma of thyroid \nSelect and explain. \nA. Huhle cell, B. Lining of tall columnar and cuboidal cell, C. Vascular invasion, D. Increased mitoses', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Ref Robbins 9/e p1094 Microscopically most follicular carcinomas are composed of uniform cells forming small follicles.follicular carcinomas may be grossly infiltrative or minimally invasive. The latter are sharply demarcated lesions on gross examination . This distinction requires extensive histologic sampling to exclude capsular or vascular invasion', 'role': 'assistant'}]