A 25-year-old male presents with an enlarged lymph node in his axillary region. Further testing confirms malignancy in the enlarged lymph node but nowhere else. In which stage of lymphoma, according to the Ann Arbor classification system, is the patient?
a. Stage I
b. Stage II
c. Stage III
d. Stage IV
Question 2
A physician is working up a patient. Based on physical examination, history, and initial screening tests, the physician suspects anaplastic large cell lymphoma (ALCL), but still needs to rule out classical Hodgkin lymophoma (HL).
Which of the following test results would confirm ALCL?
a. CD15 positive, CD30 negative
b. CD15 positive, CD30 positive
c. CD15 negative, CD30 negative
d. CD15 negative, CD30 positive
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