The procedure is usually carried out with sedation as well as local anaesthetic. The symptoms of HES are all caused by the high eosinophil count so if this can be corrected, the patient will become well. The same drugs used for HES may be appropriate in the treatment of eosinophil leukaemia. Unfortunately eosinophil leukaemia is often unresponsive to treatment. Patients with eosinophil leukaemia should discuss the prognosis with their specialist.
Prognosis See above.