Case History: The patient is a 68-year-old man presenting with fever and joint pain for four weeks. CBC showed leukocytosis with left shift and immature granulocytes, mild anemia and mild thrombocytopenia. 

Hb: 11/ Platelets: 95K// WBC: 9.9K, Differential: 55% neutrophils, 25% lymphocytes, 2% metamyelocytes, 1% basophils, 11% monocytes

Ferritin: 20868.

The patient underwent bone marrow biopsy: