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Updated: Jun 22, 2026

Generation of a Mouse Spontaneous Autoimmune Thyroiditis Model
Published on: March 17, 2023
Steroid-responsive recurrent encephalopathy associated with subacute thyroiditis
Yun Jae Chung1, Kwang-Yeol Park, Jihyun Ahn
1Division of Endocrinology, Department of Internal Medicine, Chung-Ang University College of Medicine, Seoul, Korea.
Background:
Steroid-responsive encephalopathy associated with subacute thyroiditis has, to our knowledge, not been reported previously.
Case Report:
A 49-year-old woman was found collapsed and brought to our institution with decreased mentality, dysarthria, and gait disturbance. Brain magnetic resonance imaging and angiography were normal but blood tests revealed thyroid-autoantibody-negative thyrotoxicosis. Results of a (99m)technetium-pertechnetate scan were compatible with the thyrotoxic phase of subacute thyroiditis. 14-3-3 proteins were detected in cerebrospinal fluid. Her mental status began to improve from the day following steroid administration. Recurrent encephalopathy was found 2 months after the initial admission, which was also effectively treated with steroid.
Conclusions:
We speculate that steroid-responsive recurrent encephalopathy associated with subacute thyroiditis is a subtype of Hashimoto's encephalopathy, and consider that steroid treatment should not be delayed in suspected patients.
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