A 17-year-old boy is brought to the physician for a 3-month history of a painless mass on the left side of his neck. He has had a 10-pound weight loss during this time. X-ray of the chest shows a mediastinal mass. Laboratory studies show increased serum LDH, ESR, and ferritin. Which of the following is the most likely explanation for these findings?
Follicular non-Hodgkin lymphoma
Hodgkin disease
Neuroblastoma
T-cell acute lymphoblastic leukemia (T-ALL)
Thymoma
