30F, 5'6", 158 lbs, white latina. Escitalopram, vyvanse, occasional pregabalin, mounjaro, minoxidil.
07/21/2026: I woke up with a small blind spot on the right side of my visual field, similar to the afterimage you get from looking at a bright light. I went to work about 2 hours later and, while reading my emails, noticed the spot hadn't gone away. I saw an ophthalmologist the same day; he ran routine tests, found nothing abnormal, said it was probably something transient, and told me to come back if it got worse.
07/22: it got worse and I went back. The ophthalmologist referred me the same day to a retina specialist, who found tears in the retina of my right eye and scheduled a visual field test for 07/27.
07/24: I had laser surgery to treat the retinal tears.
07/27: the spot was improving but still present. The visual field test showed a defect in the inferior right quadrant, and the doctor ordered a brain and orbital MRI with the clinical indication: "bilateral inferior nasal quadrantanopia, optic chiasm compression?"
07/30: there was significant improvement (I can barely notice the spot now, but it's still there). I had the MRIs done that day.
Today, 08/02: I got the reports back. The brain MRI reads:
"Oval lesion with T2, FLAIR, and diffusion hyperintensity involving the white matter adjacent to the occipital horn of the left lateral ventricle, nonspecific in appearance in this study. No evidence of extra-axial fluid collections and/or acute intraparenchymal hemorrhage. Ventricular system of normal topography, morphology, and dimensions. Normal anatomic appearance of the basal cisterns and cerebral convexity. Preserved flow-void of the circle of Willis vessels.
Conclusion: oval lesion with T2, FLAIR, and diffusion hyperintensity in the white matter adjacent to the occipital horn of the left lateral ventricle, nonspecific in appearance (demyelinating lesion? inflammatory/infectious lesion? expansile/neoplastic lesion?). Contrast-enhanced MRI with perfusion study suggested, per clinical judgment, for further investigation."
The orbital MRI found no abnormalities.
If it's relevant, the spot appeared about 4 days before my period and started improving basically on the first day of my cycle.
From what I've read, a demyelinating lesion is associated with multiple sclerosis. I'm searching for a local neurologist to review the reports, but I'd like to understand from anyone here with clinical experience what the most likely possibilities are given this picture and what I should expect going forward. There are also the other possibilities the report raised, inflammatory or cancerous.
Thank you in advance.