Hashimoto's Encephalopathy/SREAT Alliance (HESA)
HESA is a non-profit organization that supports patients,their families, and caregivers, educates the public and medical community, and fosters scientific research to improve diagnosis and treatment outcomes for this rare autoimmune neurological disorder.
Our mission is to support patients, caregivers and their families, raise awareness, and advocate for research.
Hashimoto's Encephalopathy (HE), also recognized as steroid-responsive encephalopathy associated with thyroid autoimmunity (SREAT), is a rare neurological condition. The key features are a variety of neurological symptoms (such as seizures, confusion, memory problems, movement disorders, and psychotic symptoms) and the presence of anti-thyroid peroxidase (anti-TPO) or anti-thyroglobulin (anti-TG) antibodies. It is considered a diagnosis of exclusion.
Seronegative autoimmune encephalitis (AE) has become a major subtype of AE. Seronegative AE can be categorized into the following three subtypes: autoimmune limbic encephalitis (LE), acute disseminated encephalomyelitis (ADEM), and antibody-negative probable AE (ANPRA).

Donating to HESA
Every dollar raised helps us achieve our mission of helping patients, caregivers, and their families; raising awareness among the public and medical community; and advocating for research.
HESA receives no government funding and relies entirely on donations and volunteers. Thank you for your consideration!
Hashimoto's Encephalopathy/SREAT & Seronegative Autoimmune Encephalitis


HESA's new book features a wide range of topics based on the most current research.
You will find sections on HE/SREAT, Seronegative AE, current treatments, interviews with medical professionals, deeply personal stories written by patients & caregivers, information about disability and so much more!
Available on Amazon, Kindle, Barnes & Noble, and Google Books!
Partner Spotlight.
BRIGHT & CPCare – Innovating the Future of Brain Injury Recovery
At the Hashimoto Encephalopathy SREAT Alliance (HESA), we believe that navigating rare autoimmune and neurological conditions requires a global "village" of support and cutting-edge science. We are proud to partner with the BRIGHT Foundation, an organization dedicated to transforming outcomes for those living with chronic brain injury and neurodiversity.



