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
Lymphoid malignancy arising from thymic cells are 
Select and explain. 
A. Follicular lymphoma, B. Diffure large B-cell lymphoma, C. Burkitt lymphoma, D. Pre-Tcell All
D: Pre-Tcell All
Answer: D: Pre-Tcell All 
Explanation: About 85% are B -ALLs, which typically manifest as childhood acute leukemia.
Less common T - ALLs tend to present in adolescent males or thymic lymphomas.
These thymic lymphomas causes compression of large vessels and airway in the mediastinum.