This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Pathology
[{'content': 'Which of the following is a ourable prognostic factor in a case of neuroblastoma? \nSelect and explain. \nA. Diploidy, B. N-myc amplification, C. Chromosome / p depletion, D. Trk A expression', 'role': 'user'}, {'content': 'Answer: D \nExplanation: High level expression of Trk A gene is associated with a ourable outcome in neuroblastoma. Favorable prognostic factors in neuroblastoma are: Age less than 1 year, Stage I and II, hyperdiploid or near diploid tumors. Ref: Robbins Pathologic Basis of Disease, 6th Edition, Page 485, 487', 'role': 'assistant'}]