A 7-year-old boy presented with dyspnea, cough and wheezing for two weeks. He was treated for asthma, with no effect. Chest X-ray examination demonstrated a large anterior mediastinal mass. Physical examination revealed facial edema and palpable cervical and axillary lymph nodes. There was no hepatosplenomegaly. Examination of the peripheral blood showed mild anemia with normal leukocyte and platelet counts. A mediastinal biopsy was obtained through mediastinoscopy (Figs. 25.1 and 25.2).


Terminal Deoxynucleotidyl Transferase Burkitt Lymphoma Mediastinal Mass Superior Vena Cava Syndrome Flow Cytometric Histogram 
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