Hypereosinophilic syndrome
MONDO:0015691Hypereosinophilic syndrome (HES) constitutes a rare and heterogeneous group of disorders, defined as persistent and marked blood eosinophilia and/or tissue eosinophilia associated with a wide range of clinical manifestations reflecting eosinophil-induced tissue/organ damage.
Also known as: HES, hypereosinophilic disease, hypereosinophilic disorder, hypereosinophilic syndrome, eosinophilia
57 clinical trials for this condition and its sub-types, 19 tagged with Hypereosinophilic syndrome itself.
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Sub-types of Hypereosinophilic syndrome
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Pulmonary eosinophilia 30 trials
1 sub-type
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1 sub-type
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Secondary hypereosinophilic syndrome 0 trials · 1 incl. sub-types
1 sub-type
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Eosinophilia-myalgia syndrome 0 trials
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Primary hypereosinophilic syndrome 0 trials
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New hope for kids with rare blood disorders: benralizumab trial launches
Disease control Recruiting nowThis Phase 3 trial tests the drug benralizumab (Fasenra) in children aged 6 to 17 with two rare eosinophilic diseases: EGPA and HES. The study aims to see if the drug is safe, how it works in the body, and whether it can help control the disease. Fourteen children will receive in…
Phase 3 • Sponsor: AstraZeneca • Aim: Disease control
Last updated Sep 20, 2026 00:00 UTC
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New drug aims to tame rare blood disorder flares
Disease control Recruiting nowThis study tests a drug called depemokimab in adults with hypereosinophilic syndrome (HES), a rare condition where too many eosinophils (a type of white blood cell) cause organ damage. The trial includes 123 people whose HES is not well controlled despite standard therapy. Partic…
Phase 3 • Sponsor: GlaxoSmithKline • Aim: Disease control
Last updated Sep 06, 2026 00:00 UTC
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New hope for rare blood disorder: dupilumab combo trial launches
Disease control Recruiting nowThis study tests whether adding dupilumab to standard treatment can help people with hypereosinophilic syndrome (HES) who still have symptoms despite current biologic therapy. About 30 adults will receive dupilumab injections for up to 48 weeks while continuing their usual medica…
Phase 2 • Sponsor: National Institute of Allergy and Infectious Diseases (NIAID) • Aim: Disease control
Last updated Aug 21, 2026 00:00 UTC
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Roll-Over study offers continued benralizumab access for patients who benefit
Disease control Recruiting nowThis study gives ongoing access to benralizumab (Fasenra) for people with asthma, eosinophilic granulomatosis with polyangiitis (EGPA), or hypereosinophilic syndrome (HES) who completed a prior benralizumab trial and still benefit from the drug. About 230 participants will receiv…
Phase 3 • Sponsor: AstraZeneca • Aim: Disease control
Last updated Aug 21, 2026 00:00 UTC
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Scientists track rare family condition to uncover hidden clues about blood disorder
Knowledge-focused Recruiting nowThis study follows about 50 members of a family with a rare inherited condition called familial hypereosinophilia, where high levels of a type of white blood cell can damage the heart and nerves. Researchers will track participants over many years with yearly checkups, blood test…
Sponsor: National Institute of Allergy and Infectious Diseases (NIAID) • Aim: Knowledge-focused
Last updated Sep 18, 2026 00:00 UTC
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Scientists seek clues on white blood cell behavior in allergies and parasites
Knowledge-focused Recruiting nowThis study aims to understand how and why eosinophils (a type of white blood cell) become active in conditions like allergies, asthma, and parasitic infections. Researchers will observe up to 800 people aged 1 to 100 with high eosinophil levels. No experimental treatments are giv…
Sponsor: National Institute of Allergy and Infectious Diseases (NIAID) • Aim: Knowledge-focused
Last updated Sep 18, 2026 00:00 UTC
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Scientists launch national effort to unravel mysteries of rare blood disorder
Knowledge-focused Recruiting nowThis study is collecting information from 600 people with chronically high levels of eosinophils (a type of white blood cell) or related organ damage. Researchers want to describe the different symptoms, disease patterns, and genetic factors involved. The goal is to better unders…
Sponsor: University Hospital, Lille • Aim: Knowledge-focused
Last updated Jun 27, 2026 09:07 UTC
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AI steps in to solve a rare disease diagnosis puzzle
Knowledge-focused Recruiting nowThis study collects medical data from 60 adults diagnosed with either EGPA or HES, two rare conditions that cause high levels of a type of white blood cell. Researchers will use artificial intelligence to find patterns that help doctors tell the diseases apart and predict how pat…
Sponsor: Fondazione IRCCS Policlinico San Matteo di Pavia • Aim: Knowledge-focused
Last updated Jun 27, 2026 08:03 UTC