| Summary: | Background: To report the use of En-face optical coherence tomography (OCT) in a patient treated with docetaxel and tamoxifen for breast cancer for the detection of macular edema (ME) without evidence of leakage on fluorescein angiography (FA). Case Presentation: A 52-year-old woman treated for breast cancer presented with bilateral visual loss for 2 months. FA showed no significant leakage while spectral-domain OCT scans of both eyes showed foveolar and parafoveolar cystic spaces in a moderately thickened macula. En-face OCT segmented at the inner retina showed the petaloid arrangement of cystic cavities, comparable to a cystoid ME. Conclusions: The combined use of tamoxifen could have potentiated the toxic effect of docetaxel on the macula. En-face OCT images may reveal a petaloid aspect of the macula due to cysts in the inner retina segmentation, when FA shows no leakage.
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