De Quervain's thyroiditis: Subacute, non-bacterial inflammation of the thyroid gland, often after viral infection of respiratory tract.
A number of diseases associated with ageing, such as atrophic gastritis and Hashimoto's thyroiditis, are probably autoimmune in this way.
Hashimoto thanked Nakayama for his guidance in his paper which led to the name of Hashimoto's thyroiditis.