case_images: PMC11152542_01
case_images: (a) Initial cranial CT, axial image, showing hydrocephalus and suboccipital extracalvarial fluid collection. (b) Post-EVD insertion cranial CT, axial image, showing the EVD tip within the left frontal horn. (c and d) Repeat cranial CT, sagittal images, showing the course of the EVD catheter through the third and fourth ventricles. (e and f) Cranial CT, sagittal and axial images, showing the EVD tip in the cisterna magna. (g and h) Post-EVD removal CT, axial and sagittal images, showing stable ventricular size and absence of hematoma along the EVD tract. CT: Computed tomography, EVD: External ventricular drain. (b-f): Yellow arrow pointed at the ventricular catheter.
case_images: SNI-15-172-g001.jpg
case_images: PMC11152542_01_SNI-15-172-g001.jpg
case_images: F1
case_images: Cranial computed tomography (CT) [Figure 1a] showed hydrocephalus and suboccipital extracalvarial fluid collection. The correct placement in the left frontal horn was confirmed with a postoperative CT scan [Figure 1b]. However, the CSF output decreased markedly, prompting a repeat cranial CT scan that showed that the ventricular size had decreased and that the tip of the EVD was in the cisterna magna [Figures 1 c-f]. Again, the patient did not exhibit any new neurologic deficits, and a post-EVD removal scan showed no increase in ventricular size and no hematoma along the intracranial tract of the EVD [Figures 1g and h].