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Hypereosinophilia and Hypereosinophilic Syndrome

 • Secondary Hypereosinophilic Syndrome
 • Clinically Relevant HES Variants
 • When to
Hypereosinophilia ... and Hypereosinophilic ... Syndrome #HES #Hematology ... #eosinophilia # ... eosinophils #diagnosis
Eosinophilia - Differential Diagnosis Algorithm
Idiopathic Eosinophilia
Primary Eosinophilia:
 • Primary hypereosinophilic syndrome
 • Eosinophilic Leukemia
 • MPN/MDS
: • Primary hypereosinophilic ... GI, lung, skin), ... AI: EGPA, IgG-4 disease ... , Behcet disease ... Chronic inflammatory disease
Eosinophil Disorders Testing Algorithm
INDICATIONS FOR TESTING:
 • Peripheral blood eosinophilia/hypereosinophilia uncovered incidentally during medical evaluation or
Eosinophil Disorders ... /hypereosinophilia ... 1,500 cells/µL • Hypereosinophilia ... Differential #diagnosis #hematology ... #eosinophilia
Differential Diagnosis of Pulmonary Eosinophilia
Infection:
 • Helminthic: Loffler syndrome (Ascaris, hookworm, Strongyloides), Tropical pulmonary eosinophilia (lymphatic
Differential Diagnosis of Pulmonary ... Strongyloides), Tropical pulmonary ... Acute chronic pulmonary ... eosinophilia, Hypereosinophilic ... #Pulmonary #Differential
Approach to Eosinophilic Lung Diseases
 • Acute Eosinophilic Pneumonia (< 1 wk) - ~30yo, M; Recent
Lung Diseases ... • Acute Eosinophilic ... , CV, renal • Hypereosinophilic ... #Lung #Diseases ... #pulmonary #differential
Causes of Eosinophilia - Differential Diagnosis
Bugs:
 - Fungus (aspergillosis)
 - Viral (HIV)
 - Ectoparasites (scabies, myiasis)
Causes of Eosinophilia ... DRESS - AIN - Eosinophilic ... Leukemia - Primary Hypereosinophilic ... coyefish379 #Eosinophilia ... Diagnosis #Causes #hematology
Eosinophils (Eos) and hypereosinophilia (HE)
Caused by eosinophilopoietic cytokines
Common causes:
 - Drug reaction
 - Helminth infection
 -
Eosinophils (Eos ... ) and hypereosinophilia ... , IgG4-related disease ... TerrierBen #Eosinophils ... #hypereosinophilia
Hypereosinophilia Syndrome (HES) - Diagnosis and Management
Definition: An absolute eosinophil count (AEC) greater than 1500 and
Hypereosinophilia ... attributable to eosinophilia ... with blood eosinophilia ... Alert_Oriented3 #Hypereosinophilia ... #diagnosis #hematology
Interstitial Lung Diseases (ILD)
Exposure-Related ILD (a.k.a. extrinsic allergic alveolitis): 
 • Hypersensitivity pneumonitis, Farmer's lung, Bird
• Idiopathic pulmonary ... polyangiitis, Eosinophilic ... syndrome) • Eosinophilic ... Acute, Chronic • Pulmonary ... #differential #pulmonary
Small Vessel Vasculitides
 • Granulomatosis with polyangiitis - Granulomatous manifestations (e.g., nasal crusting, destructive sinusitis, pulmonary
destructive sinusitis, pulmonary ... - Interstitial lung ... diseaseEosinophilic ... polyangiitis - Asthma. eosinophilia