PMC8608540_01
PMC8608540_02
T2WI axial section showing hemorrhage segmentation at the beginning of the examination (red outline), with a 3D reconstruction at the same stage.
CRIRA2021-9716952.001.jpg
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fig1
A striking increase in the size of the hematoma between the native and the final sequences was noted, starting with 8.1 ml (3.2 x 3.2 x 1.6 cm) on the DWI (Figure 1) and reaching 56.6 ml (6 x 5.9 x 3.2 cm) on the 3D
GRE axial section showing hematoma segmentation at the end of the examination and a 3D reconstruction of the hematoma with an obvious increase in its size referred to as the flood phenomenon.
CRIRA2021-9716952.002.jpg
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fig2
TOF exerting a significant mass effect over the right lateral ventricle (Figure 2). These findings are compatible with an active, on spot, bleeding caused by the rapidly flowing blood from many small capillaries into an impervious ground (central gray matter), mimicking the naturally occurring flood phenomenon.
Signs of hematoma heterogeneity predicting expansion: (a) the "black hole" sign, (b) the "blend" sign, (c) the "spot" sign, (d) the "island" sign, (e) the "satellite" sign, and (f) a parenchymal hematoma extending into the lateral ventricle.
CRIRA2021-9716952.003.jpg
PMC8608540_02_CRIRA2021-9716952.003.jpg
fig3