Understanding Absolute Leukocytosis with Lymphocytosis & Thrombocytosis: Causes & Conditions

* Infectious mononucleosis

* Cytomegalovirus infection

* Infectious hepatitis

* Toxoplasmosis

* Certain drugs (e.g., phenytoin, carbamazepine, allopurinol)

* Hematologic disorders (e.g., chronic myeloid leukemia, myelodysplastic syndrome)