This image is licensed under a Creative Commons Attribution-Non Derivative Works 4.0 International License. I.e. the illustrations can also be used for commercial purposes free of charge. However, the illustrations are not copyright free, but the usage is allowed under the following conditions:

  1. You must credit “” as the author and indicate the license (CC BY-ND 4.0 EN).
  2. Modifying illustrations is not allowed, especially removing our logo / URL.

If you use the illustration on a website, we would appreciate a link to

You want extended usage rights or a high-resolution version of the illustration? Visit our store at Gumroad (external link).

Riedel thyroiditis

Free illustration of Riedel’s thyroiditis. In this thyroid disorder the normal thyroid parenchyma is replacemed by a dense fibrosis that invades adjacent structures and extends beyond the thyroid capsule. The thyroid gland is stone-hard (woody) and fixed to adjacent structures.



Information illustration – Title – Riedel-Thyreoiditis – Keywords – Illustration, Riedel’s thyroiditis, fibrosis, stone-hard, woody, thyroid gland, hardened, inflammation, inflammation of the thyroid gland, sclerosis – Copyright Notice – Creative commons – Attribution-NoDerivatives 4.0 International (CC BY-ND 4.0)