Metastatic spread of tumors to the iris is rare.1 Such lesions most commonly arise from a primary breast or lung neoplasm and are associated with widespread carcinomatosis and a short life expectancy.
We report a case of local excision of a solitary thyroid metastasis to the iris in a patient without any evidence of extraocular malignancy.
Report of a Case.
—A 38-year-old Asian woman in good health presented with mild dull pain in the right eye of 3 weeks' duration. The patient gave a medical history of partial thyroidectomy 7 years earlier that had been performed to explore a "cold nodule" found on iodine 123 scan. However, pathologic examination had demonstrated multinodular hyperplasia without any evidence of neoplasia.Slit-lamp examination revealed a spherical, pink, vascularized tumor in the superotemporal iris (Fig 1). Fluorescein angiography confirmed the highly vascular nature of the mass with leakage of dye into the anterior
Ainsworth JR, Damato BE, Lee WR, Alexander WD. Follicular Thyroid Carcinoma Metastatic to the Iris: A Solitary Lesion Treated With Iridocyclectomy. Arch Ophthalmol. 1992;110(1):19-20. doi:10.1001/archopht.1992.01080130021012