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Incorrect placement of the draining catheter by burr hole.
Notes: (A, B) MRI showing a CSDH on the left side before the operation. (C, D) CT scan showing inadvertent placement of the catheter in the brain parenchyma after burr-hole surgery.
Abbreviations: CSDH, chronic subdural hematoma; CT, computed tomography; MRI, magnetic resonance imaging.
