Q. A 60-year-old male presents to the clinic complaining of unexplained weight loss over the past three months, persistent fatigue, and night sweats. He reports an unintentional weight loss of 15 pounds and feels unusually weak and tired. He has also been having fevers that seem to come and go. On further inquiry, he mentions that he has also been having some abdominal discomfort. On physical examination, there are enlarged, non-tender lymph nodes in his cervical and inguinal regions. His abdomen is soft, with mild splenomegaly noted on palpation. Laboratory findings reveal a hemoglobin of 10.5 g/dL, WBC of 13,000/uL, and platelet count of 145,000/uL. LDH levels are elevated at 275 U/L. What would be the most appropriate next step in the management of this patient?