





Hashimoto's Encephalopathy/SREAT & Seronegative Autoimmune Encephalitis Alliance
Providing patient support, public awareness, and medical research for Hashimoto's Encephalopathy (HE)/SREAT and Seronegative Autoimmune Encephalitis (SAE).
HESA is a 501 3(c) not for profit organization for
Autoimmune Encephalitis, specifically Hashimoto's Encephalopathy/SREAT (HE/SREAT) and
Seronegative Autoimmune Encephalitis (SAE).
Seronegative means there is no known antibody identified as the cause of Autoimmune Encephalitis.
The Hashimoto’s Encephalopathy/SREAT & Seronegative Autoimmune Encephalitis Alliance was formed in 2012 by two HE patients.
It is HESA’s mission to collect, archive, and share information regarding Hashimoto’s Encephalopathy (“HE”),
also known as Steroid Responsive Encephalopathy Associated with Thyroiditis (“SREAT”),
and Seronegative Autoimmune Encephalitis ("SAE") with the public and medical professionals.
We share information relevant to HE/SREAT, and SAE updates on HESA's activities and our publications.





Hashimoto's Encephalopathy/SREAT & Seronegative Autoimmune Encephalitis
Available on Amazon, Barnes and Noble, and here in our bookstore.
UPCOMING RESEARCH
Better Insights, Better Outcomes
Join us in transforming lives through groundbreaking HE Research
Hashimoto’s Encephalopathy (HE) is a rare autoimmune disease that disrupts lives in profound ways. It affects people of all ages, races, and ethnic backgrounds, causing brain dysfunction. While some patients recover after treatment, many remain permanently impaired, unable to return to their pre-HE lives.
But there is hope.
For the first time, research is being conducted to transform the diagnosis and treatment of HE. HESA is partnering with Dr. Ahmed Obeidat, a leading expert at the Medical College of Wisconsin, to conduct a groundbreaking study that aims to improve outcomes for HE patients worldwide.
Why does this research matter?
The diagnosis of HE is made difficult because there is, to date, no definitive test to establish it. For those who receive a diagnosis of HE, treatment usually involves immunosuppression, but treatment protocols are not universal and in many cases, patients cannot obtain insurance approval for the more costly treatment protocols that become necessary when first-line treatments fail, with insurers classifying such treatments as “experimental” or “unproven” due to the lack of studies establishing their efficacy.
Dr. Obeidat believes HE is under-studied, under-recognized, and under-diagnosed. As a result, he has observed that many HE patients do not receive proper care. He is dedicated to improving the medical diagnosis and treatment of HE, including long-term patient management.
With your support, we can:
● Identify the frequency and nature of abnormal diagnostic tests in HE patients.
● Understand the factors influencing treatment decisions and outcomes.
● Compare markers of neural damage in HE patients and controls.
● Develop an educational curriculum for healthcare professionals.
● Create no-cost educational materials for patients and families.
This is the first study of its kind, and its findings have the potential to revolutionize how HE is diagnosed and treated, improving the lives of countless patients.
How you can help
HESA receives no government funding and relies entirely on donations to make this research
possible. We aim to raise $10,000 to fund this critical study. Every dollar brings us closer to:
- Providing hope for patients and families.
- Equipping doctors with the tools they need to deliver better care.
- Advancing understanding of a disease that has been overlooked for too long.
Donate today
Your support can change lives. Together, we can create a future where HE patients receive
timely diagnoses, effective treatments, and the chance to reclaim their lives.
Dr. Ahmed Obeidat
A TRUE PERSONAL NARRATIVE
BY KRISTEN L.

Join us as we speak with AE caregivers. For full videos CLICK HERE
AE CAREGIVER SERIES
PARTICIPATE IN A SURVEY
You can get involved by helping us understand our community
by filling out oursimple survey about your AE
HESA IN-PERSON MEET UPS
An in-person face to face
meeting with other autoimmune encephalitis patients, caregivers, family members and friends.




WEDA- World Encephalitis Day Conference- 2025

CONFERENCES & SYMPOSIUM
"Strides in Autoimmune Encephalitis": An Autoimmune Encephalitis Assembly,October, 2024




NOTEABLE ARTICLES, BOOKS & RESEARCH

Medical Gaslighting: A Growing Concern in Modern Healthcare
Feature Article December - January 2025

Hashimoto's Encephalopathy/SREAT & Seronegative Autoimmune Encephalitis
HESA 2024


The Acute Neurology Survival Guide
With section on Autoimmune Encephalitis
Catherine S.W. Albin, Sahar F. Zafar

Autism or Encephalitis?
"My Son’s Misdiagnosis &
Our Family’s Season in Hell"
S. Stiles, Quillette, 1/21/22

Understanding Hashimoto's Encephalopathy:
An Expanded and Updated Guide for
Patients and Caregivers. 2016 Edition.
HESA