77-year-old man presents to his primary care physicians office after experiencing two weeks of night sweats that have required him to get up at night and change his pajamas. In addition, he reports, fatigue, chills, and fever. He thinks he may have a virus.
Physical exam finding: lymphadenopathy &hetaosplenmegaly
Labs: CBC reveals a total of WBC of 65,000/uL, and netropenia.
The primary care physician repeats the CBC four weeks later, and leukocytosis is still present. on a microscopic examination of the blood sample, smudge cells were visualized
Which of the following is the correct diagnosis?