Which thyroid condition is classically linked with exophthalmos?

Which thyroid condition is classically linked with exophthalmos?

• A. Graves disease
• B. Hashimoto's thyroiditis
• C. De Quervain thyroiditis
• D. Goiter

Answer: (A)

Exophthalmos is most characteristic of Graves disease due to autoimmune eye involvement. In Graves, antibodies stimulate the TSH receptor not only in the thyroid but also in tissues behind the eye. This triggers inflammation and the production of glycosaminoglycans by orbital fibroblasts, leading to edema, fat buildup, and enlargement of the extraocular muscles. The result is protruding eyes and sometimes double vision. Hashimoto’s thyroiditis is autoimmune but typically causes hypothyroidism and does not present with the eye changes seen in Graves. De Quervain thyroiditis is a painful, usually transient thyroiditis following a viral illness and does not cause exophthalmos. Goiter refers to thyroid enlargement alone and does not imply the eye findings characteristic of Graves. So, the classic link to exophthalmos is Graves disease.

Exophthalmos is most characteristic of Graves disease due to autoimmune eye involvement. In Graves, antibodies stimulate the TSH receptor not only in the thyroid but also in tissues behind the eye. This triggers inflammation and the production of glycosaminoglycans by orbital fibroblasts, leading to edema, fat buildup, and enlargement of the extraocular muscles. The result is protruding eyes and sometimes double vision.

Hashimoto’s thyroiditis is autoimmune but typically causes hypothyroidism and does not present with the eye changes seen in Graves. De Quervain thyroiditis is a painful, usually transient thyroiditis following a viral illness and does not cause exophthalmos. Goiter refers to thyroid enlargement alone and does not imply the eye findings characteristic of Graves.

So, the classic link to exophthalmos is Graves disease.