As noted above, a<unk>  is typically a response to an underlying medical issue. Causes of<unk> s include: * Severe hemorrhage (retroperitoneal hemorrhage) * Drugs * Use of sulfa drugs * Use of dapsone * Use of glucocorticoids * Use of G-CSF or related growth factors * All-trans retinoic acid (ATRA) * Ethylene glycol intoxication * Infections * Clostridium difficile * Tuberculosis * Pertussis * Infectious mononucleosis (lymphocyte predominant) * Visceral larva migrans (eosinophil predominant) * Asplenia * Diabetic ketoacidosis * Organ necrosis * Hepatic necrosis * Ischemic colitis * As a feature of trisomy 21 in infancy (incidence of ~10%) * As a paraneoplastic phenomenon (rare)
Leukemoid reaction
Mast cell leukemia
Lymphoid leukemia
AIDS-related lymphoma
Prolymphocytic leukemia
Mixed-phenotype acute leukemia
Acute myeloid leukemia
Chronic neutrophilic leukemia