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Published on: April 24, 2020
Loss of vision due to a physiologic pituitary enlargement during normal pregnancy
Toshihiro Inoue1, Akihiro Hotta, Maiko Awai
1Department of Ophthalmology and Visual Science, Graduate School of Medical Sciences, Kumamoto University, 1-1-1 Honjo, Kumamoto, Japan. noel@da2.so-net.ne.jp
Background:
Physiologic pituitary enlargement during normal pregnancy is well known, but we are unaware of previous reports on a natural course of visual loss due to this disease.
Methods:
A 30-year-old woman presented blurred vision in the left eye from the 30th week of pregnancy. At 38 weeks visual acuity was 0.9 in the left eye. Automated perimetry revealed a mild central visual defect in the left eye. A magnetic resonance imaging (MRI) scan revealed pituitary enlargement with compression of the anterior optic chiasm. We observed the natural course of this case.
Results:
At 16 weeks after delivery, visual acuity was 1.5 in both eyes with normal visual field, and an MRI scan revealed a normal-sized pituitary without compression of the optic chiasm.
Conclusions:
Ophthalmologists should be aware of visual loss by physiologic pituitary enlargement to avoid unreasonable neurosurgical procedures.
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