Let’s look at another example of basophilia in CML:
The data above are from a patient with ITP who received a 4 day course of dexamethasone 40 mg PO daily. Note that the glucocorticoid-induced leukocytosis is not associated with an increase in basophil count. In fact, some studies have shown that glucocorticoids reduce basophil counts.1
This is a case of a leukemoid reaction in a patient with septic shock. Note that the basophil count is low, not elevated!
This patient has idiopathic eosinophilic syndrome. Note that the basophil count does not track with the eosinophil count.