case_images: PMC8720421_01
case_images: Computed tomography of the head demonstrating a mixed density left occipital lesion with the presence of hypodense material extending into the lateral ventricle.
case_images: SNI-12-583-g001.jpg
case_images: PMC8720421_01_SNI-12-583-g001.jpg
case_images: F1
case_images: Computed tomography (CT) of the head demonstrated a left occipital lesion concerning for intracranial abscess with intraventricular extension [Figure 1].
case_images: Magnetic resonance images (a and b) of the brain showing a ring-enhancing left occipital lesion with intraventricular enhancement consistent with intraventricular rupture of an intracranial abscess.
case_images: SNI-12-583-g002.jpg
case_images: PMC8720421_01_SNI-12-583-g002.jpg
case_images: F2
case_images: This was confirmed on contrast-enhanced magnetic resonance imaging (MRI) that also demonstrated diffuse enhancement of the lateral and third ventricles [Figure 2a and b].
case_images: Computed tomography of the head used to confirm placement of the IRRAflow  catheter within the left lateral ventricle.
case_images: SNI-12-583-g003.jpg
case_images: PMC8720421_01_SNI-12-583-g003.jpg
case_images: F3
case_images: To treat the hydrocephalus associated with his ventriculitis, a left-sided Kocher's point IRRAflow  catheter system was placed and set to drain-only mode [Figure 3].
case_images: Computed tomography of the head demonstrating placement of the second IRRAflow  catheter within the right lateral ventricle.
case_images: SNI-12-583-g004.jpg
case_images: PMC8720421_01_SNI-12-583-g004.jpg
case_images: F4
case_images: Overnight, the IRRAflow  catheter became clogged with thick pus, and a second right-sided IRRAflow  catheter was placed [Figure 4].
case_images: Magnetic resonance imaging of the brain following IRRAflow  treatment showing decreased ventricular abscess burden.
case_images: SNI-12-583-g005.jpg
case_images: PMC8720421_01_SNI-12-583-g005.jpg
case_images: F5
case_images: Repeat MRI completed approximately 1 week after the patient's presentation demonstrated decrease in the abscess burden and ventricular enhancement [Figure 5].