PMC2367395_01
Case report 1. a, b Axial T1 MRI depicting very small slit-like lateral and third ventricles, c sagittal T2 MRI showing small third ventricle and lamina terminalis, d, e postoperative axial T1 MRI showing minimal increase in size of the lateral ventricles; f postoperative sagittal T2 MRI shows a minimal increase of the third ventricle, but no flow void phenomenon at the lamina terminalis
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Fig1
However, the very narrow slit-like lateral ventricles and third ventricle did not allow a safe execution of this procedure (Fig. 1a-c). MRI control examination did not reveal a significant increase in the size of the ventricular system (Fig. 1d-f).
Postoperative photograph of case 1 showing the hardly visible scar of the eyebrow incision
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Fig2
As an alternative, a microsurgical fenestration of the lamina terminalis and Liliequist's membrane was performed via a right-sided eyebrow incision and a small supraorbital craniotomy (Fig. 2).
PMC2367395_02
Case report 2. a, b Preoperative CT scan depicting slit-like ventricles; c, d postoperative CT scan with minimal increase of ventricle size and a residual ventricular catheter that could not be removed
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Fig3
A computed tomography (CT) scan 1.5 years after surgery shows a minimal increase in the size of the ventricles (Fig. 3).