PMC5682696_01
Computed tomographic (CT) scan on day 1 after birth. (a) Axial images revealing intraventricular hemorrhage (IVH) in the lateral ventricles, the 3rd ventricle, and the 4th ventricle. Compared with the IVH, the subdural hemorrhage (SDH) in the infratentorial space and tentorial incisura (white arrows), and the hematoma in the suprapineal recessus (white dotted arrow) are barely visible. (b) Mid-sagittal views. The quadrigeminal cistern in the tentorial incisura (white arrows) is seem to be connected to the IVH in the third ventricle via the suprapineal recessus (white dotted arrow)
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F1
However, SDH with subarachnoid hemorrhage (SAH) was barely visible compared with the IVH [Figure 1a]. Nonetheless, mid-sagittal views clearly demonstrated SDH with SAH in the infratentorial area and the tentorial incisura, which was seen to be connected to the IVH in the 3rd ventricle via the superior pineal recessus [Figure 1b].
Magnetic resonance (MR) images on day 18 after birth. (a) Axial and (b) sagittal views of T1-weighted images show marked enlargement of the ventricular system. The infratentorial SDH persists (white arrows), while most of the IVH is resolved. (c) Sagittal heavily T2-weighted images show an enlarged suprapineal recessus (white dotted arrow), which appears to extend into the infratentorial SDH (white arrows). Internal cerebral veins (ICVs) are depicted as a linear signal void at the roof of the third ventricle and the suprapineal recessus (white arrow heads)
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F2
On day 18, magnetic resonance (MR) images showed marked enlargement of the entire ventricular system [Figure 2a]. Although most of the IVH was resolved [Figure 2a], the infratentorial SDH persisted [Figure 2b]. The 3D heavily T2-weighted imaging (3D-hT2WI) showed internal cerebral veins (ICVs) visualized as a linear signal void at the roof of the 3rd ventricle and an enlarged suprapineal recessus [Figure 2c].