Tamoxifen retinal toxicity. Monitoring by multimodal imaging study.

Introduction: Tamoxifen is a non-steroidal anti-oestrogen that acts as an antagonist in breast tissue, neurosensory retina, and retinal pigment epithelium (RPE). The reported incidence of its ocular effects varies between 0.9% and 11%.

Methods: Case series. Multimodal image studies were used to evaluate three female patients who were receiving tamoxifen for breast cancer for the purpose of monitoring and determining whether there are changes after discontinuation of treatment.

Results: All three patients showed signs of crystalline retinopathy using spectral domain optical coherence tomography (SD-OCT) during follow-up.

Conclusion: The follow-up using multimodal imaging studies allowed evaluating the progression of the changes, providing a prognostic assessment. The findings reported (visual acuity and multimodal imaging) confirmed the results of previous studies, indicating that, at a certain level of toxicity, the damage was irreversible.