A 45-year-old male patient presents with symptoms of fatigue and a 20 lbs weight loss over the past 4 months. He states he has not been trying to lose weight. The initial complete blood count (CBC) reveals marked leukocytosis. The bone marrow aspirate detects the presence of the Philadelphia chromosome. Based on these findings, the NP suspects the patient likely has which disorder?
A. Chronic Lymphocytic Leukemia
B. Acute Lymphocytic Leukemia
C. Acute Myeloid Leukemia
D. Chronic Myeloid Leukemia