A 6-year-old boy is brought to the physician for a 1-month history of generalized lymphadenopathy and fatigue. Platelet count is 100,000/μL. Hemoglobin is 11 g/dL. A blood smear is shown. Which of the following is most likely to be seen in this patient?
CD15 positivity on B cells
Increased serum lamda
Pruritis
Single palmar crease
Thymic lesion
