RETINOPATHY CAUSED BY TREATMENT WITH TAMOXIFEN IN LOW DOSAGE

Abstract

In 17 patients treated with tamoxifen in a low dosage (30 mg daily) ophthalmological examination was performed. This revealed 2 cases with possible retinotoxic effect. A 64 yr old woman treated with tamoxifen for 9 mo. for metastatic breast cancer developed retinopathy with transitory visual impairment. The retinopathy was morphological characterized by multiple yellowish-white dots in the posterior pole, a parafoveal hemorrhage and accumulation of reticular pigment changes in the periphery of the retina. By retinal fluorescein angiography multiple nonfluorescent dots and hyperfluorescent areas were seen in the posterior pole. The retinal lesions remained unchanged except for the hemorrhage after discontinuation of the tamoxifen treatment. In another patient some of these changes were also found. The retinotoxic effect of tamoxifen was reported previously with tamoxifen in high dosage (.gtoreq. 180 mg daily, minimal total dosage of 90 g) used for long periods, but never from this drug in low dosage (30 mg daily, minimal total dose 8.1 -12.0 g).