Introduction: Tamoxifen citrate is an anti-estrogen agent used in the treatment of breast carcinoma. Crystalline maculopathy is a rare complication of tamoxifen therapy. The clinical picture resembles that of idiopathic macular telangiectasia (IMT) Type 2, which is a more common clinical entity.
Objective: To report a case of crystalline maculopathy secondary to tamoxifen and highlight the importance of the medical history and investigations in differentiating it from IMT Type 2.
Case: A diabetic female with a past history of breast carcinoma treated with tamoxifen came to the hospital for a routine eye check-up. Crystalline deposits were seen in the parafoveal region in both the eyes.The spectral domain optical coherence tomography (SD-OCT) showed foveal cysts in the inner retinal layer and fundus autofluorescence (FAF) and fundus fluorescein angiography (FFA) were within normal limits.
Conclusion: While tamoxifen maculopathy is reversible on stopping the therapy, IMT needs a long-term follow-up to monitor the potential risk of loss of vision due to choroidal neovascularization, hence necessitating the distinction between these two different clinical entities.
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