What is HESA?



HESA – the Hashimoto’s Encephalopathy SREAT Alliance – is a 501(c)(3)  nonprofit organization formed in 2012.

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”) or simply Autoimmune Encephalopathy (“AE”) with the public and medical professionals. Other names used to describe  HE/SREAT are Nonvasculitic Autoimmune Meningoencephalitis (“NAIM”), and Encephalopathy Associated with Autoimmune Thyroid Disease (“EAATD”).  HESA takes no position on the most appropriate name for the disease, however on this website the abbreviation “HE” is generally used as a shorthand way to refer to the condition. 

HESA has published a book, “Understanding Hashimoto’s Encephalopathy” which is available for sale at Amazon.com by clicking on this link: “Understanding Hashimoto’s Encephalopathy”

HESA also raises funds to support scientific research, and is planning a documentary film project. HESA’s website provides information and links to a variety of resources for patients, physicians, caregivers, and others interested in this poorly understood disorder. We appreciate your fully tax-deductible donations (see the Donate link above).  Please also consider purchasing a HESA cookbook, featuring easy to prepare recipes submitted by HE patients. All proceeds go to support HESA.


Although you will find a great deal of information about HE/SREAT on this website, the site is not written, monitored, or maintained by a physician. The site is intended to provide information only. HESA cannot provide medical advice. If you have HE/SREAT, or think you may have it, consult a qualified neurologist, preferably one with experience addressing immune-mediated illness.

Nothing on this website is – nor should it be considered to constitute – medical advice.