PMC8720421_01
Computed tomography of the head demonstrating a mixed density left occipital lesion with the presence of hypodense material extending into the lateral ventricle.
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F1
Computed tomography (CT) of the head demonstrated a left occipital lesion concerning for intracranial abscess with intraventricular extension [Figure 1].
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.
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F2
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].
Computed tomography of the head used to confirm placement of the IRRAflow  catheter within the left lateral ventricle.
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F3
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].
Computed tomography of the head demonstrating placement of the second IRRAflow  catheter within the right lateral ventricle.
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F4
Overnight, the IRRAflow  catheter became clogged with thick pus, and a second right-sided IRRAflow  catheter was placed [Figure 4].
Magnetic resonance imaging of the brain following IRRAflow  treatment showing decreased ventricular abscess burden.
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F5
Repeat MRI completed approximately 1 week after the patient's presentation demonstrated decrease in the abscess burden and ventricular enhancement [Figure 5].