<prompt> A young boy came with dyspnea and was found to have a mediastinal mass. Which of the following is known to produce mediastinal lymphadenopathy?Diffuse large B cell LymphomaB cell rich T cell lymphomaMediastinal rich B cell lymphomaT cell Lymphoblastic ALL  <response>: mediastinal lymphadenopathy ,sternal tenderness and mediastinal mass are seen with ALL. 