Synonyms: Marchiafava-Micheli disease | PNH
Paroxysmal nocturnal hemoglobinuria (PNH) is an acquired clonal hematopoietic stem cell disorder characterized by corpuscular hemolytic anemia bone marrow failure and frequent thrombotic events.
Data from Orphanet are used to provide information on a disease's name, synonym(s), and overview. Reference: Access aggregated data from Orphanet at Orphadata. Orphadata: Free access data from Orphanet. © INSERM 1999. Available on http://www.orphadata.org. Data version August 2026
Newly diagnosed with
Paroxysmal nocturnal hemoglobinuria?
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Advocacy Organizations
CDG CARE
CDG CARE (Community Alliance and Resource Exchange) is a 501(c)(3) nonprofit public charity dedicated to representing all Congenital Disorders of Glycosylation (CDG) — a group of rare, inherited metabolic disorders that disrupt a complex enzymatic process essential to nearly every system in the body. Founded by parents seeking information, connection, and hope, CDG CARE has grown into a global organization serving patients, families, clinicians, and researchers across more than 200 known CDG types. Our mission is to raise awareness, support families, and fund research to improve the diagnosis, care, and treatment of CDGs. We pursue this mission through programs that meet families wherever they are in their journey, from the moment of diagnosis through the search for therapies. At every level of our work, CDG CARE is driven by a simple belief: that no family facing a CDG diagnosis should feel alone, and that together... families, scientists, clinicians, and advocates, we can move research, therapies, and hope forward.
CDG Canada
CDG Canada supports patients and families affected by Congenital Disorders of Glycosylation (CDG).
Louisiana Metabolic Disorders Coalition
We support, educate, and advocate for patients & families affected by metabolic disorders.
Mississippi Metabolics Foundation
Our mission at Mississippi Metabolics Foundation (MMF) is to advocate, educate, and support families in MS affected by genetic metabolic disorders/inborn errors of metabolism (IEM's). MMF promotes initiatives and further advancements in legislation, education, research, clinical trials, studies, therapies, targeted treatments, and eventual cures for IEM’s and all rare diseases.
Team Telomere
A Community for Telomere Biology Disorders Our mission is to provide information and support services to families worldwide affected by Dyskeratosis Congenita and Telomere Biology Disorders, to encourage the medical community’s research in finding causes and effective treatments, and to facilitate improved diagnosis by educating medical providers.
Turkish Association of the fight against PNH and aHUS Diseases
Our patient organization is called Turkish Assocaition of the fight against PNH and aHUS Diseases. We try to help to our patients in our community ,enlight their long journey, make them feeling not alone. We give them support and guidance.
Uganda Alliance of Patients Organization
Supporting patients to access quality, safe and patient-centered healthcare services.
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Clinical Trials
For a list of clinical trials in this disease area, please click here.