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': 'Lymphoid malignancy arising from thymic cells are \nSelect and explain. \nA. Follicular lymphoma, B. Diffure large B-cell lymphoma, C. Burkitt lymphoma, D. Pre-Tcell All', 'role': 'user'}, {'content': 'Answer: D \nExplanation: About 85% are B -ALLs, which typically manifest as childhood acute leukemia.\nLess common T - ALLs tend to present in adolescent males or thymic lymphomas.\nThese thymic lymphomas causes compression of large vessels and airway in the mediastinum.', 'role': 'assistant'}]