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We thank Tan and coworkers for their interest in our article.¹ Our patient developed CBS within a visual field defect caused by resection of the right occipital cortex. As mentioned by Tan and coworkers in their letter, physicians should be concerned about CBS in patients with cortical pathologic abnormalities, in addition to the well-described issue of CBS in patients with ocular pathologic abnormalities.

The pathophysiologic nature of CBS has been suggested to involve a release phenomenon^2-3 or sensory deprivation.⁴ Although the exact mechanisms of CBS are still a topic of debate, a common point is decreased sensory input and subsequent reorganization of the visual system with or without cortical involvement.⁵

Tan and coworkers mentioned that occurrence of visual hallucination after neurosurgery may be indicative of attempts at visual recovery and may therefore be a good sign. In support of this, some patients have indeed developed visual hallucinations during . . . [Full Text of this Article]

AUTHOR INFORMATION

Eun Jung Choi, MD; Sang Ahm Lee, MD

RELATED ARTICLE

Charles Bonnet Syndrome After Occipital Cortical Resection for Cortical Dysplasia May Be Related to Denervation Supersensitivity
Colin S. H. Tan and Bernhard A. Sabel
Arch Neurol. 2005;62(9):1479.
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