Charles Bonnet Syndrome and Multiple Sclerosis
Ms. A, a 56-year-old woman with no cognitive impairment, claimed to see vivid and complicated images after losing her vision for 4 months as a result of optic neuritis. These images changed in shape, color, and size and included Chinese and English characters, vegetables, and small animals that could penetrate into her abdomen. She recognized them as unreal, but they existed at all times, whether she had her eyes open or closed.She had suffered from multiple sclerosis for about 20 years and had no comorbid psychiatric disorders. Besides her temporary loss of vision, she experienced effects on her cervical and thoracic spinal cord. She became bedridden and completely dependent on the care of others. In an assessment of cognitive functioning, she scored 25 out of 30 points on the Mini-Mental State Examination, excluding the items that require vision (5 points). Magnetic resonance imaging of her brain revealed high signal intensity in both periventricular and white matter regions of the parietal lobes. Carbamazepine treatment, 200 mg t.i.d., was initiated, and Ms. A’s visual hallucinations were significantly reduced. However, after she stopped taking carbamazepine, the visual hallucinations returned, but they disappeared after she resumed taking carbamazepine.
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