case_images: PMC7303770_01
case_images: Initial MRI. (a) Large homogeneous hyperintense asymmetric cystic
  lesion in the lateral ventricles, delineated by a thin wall
  (arrows). Severe dorsal left thalamic compression (arrowhead),
  generalised cortical thinning, effacement of the cerebral sulci
  and subarachnoid space are observed. (b) The cystic lesion
  appears to be closely related to the left choroid plexus
  (arrowhead). T2-WI = T2-weighted image; T1-WI = T1-weighted
  image
case_images: 10.1177_2055116920930181-fig1.jpg
case_images: PMC7303770_01_10.1177_2055116920930181-fig1.jpg
case_images: fig1-2055116920930181
case_images: Measured dimensions were 27.7 x 29.1 x 24.3 mm (length x width x height) (Figure 1).
case_images: Two days post-trepanation control MRI. The cyst appears decreased
  compared with Figure 1a. Subarachnoid cerebrospinal fluid is
  visible and brain herniations were no longer observed (data not
  shown). T2-WI = T2-weighted image
case_images: 10.1177_2055116920930181-fig2.jpg
case_images: PMC7303770_01_10.1177_2055116920930181-fig2.jpg
case_images: fig2-2055116920930181
case_images: On the 2 days post-decompression MRI, marked decreased size of the lesion, apparent subarachnoid CSF and absence of brain herniation were observed (Figure 2).
case_images: Ten days post-cardiorespiratory arrest. (a) Marked enlargement of
  the cyst, compared with Figure 2, showing
  recurrence of the lesion. Diffuse cortical and thalamic
  T2-weighted hyperintensity of the grey matter, compatible with
  global brain ischaemia. (b) Diffuse post-contrast signal
  enhancement of the cortical and thalamic grey matter. T2-WI =
  T2-weighted image; T1-WI = T1-weighted image
case_images: 10.1177_2055116920930181-fig3.jpg
case_images: PMC7303770_01_10.1177_2055116920930181-fig3.jpg
case_images: fig3-2055116920930181
case_images: MRI was repeated 10 days post-CPR, demonstrating recurrence of the cystic lesion, diffuse cortical and thalamic T2W and T2-FLAIR hyperintensity of the grey matter and heterogeneous contrast enhancement (Figure 3).
case_images: (a) Pre-cystoperitoneal shunting MRI. Increased size of the cystic
  lesion, 1 month after the last CT-guided aspiration. The
  subarachnoid cerebrospinal fluid is visible contrary to the
  initial diagnosis, although the cyst size is similar. This may
  be due to cortical atrophy secondary to the global brain
  ischaemia. (b) Post-cystoperitoneal shunting MRI. The shunt tip
  is visible inside the cystic lesion (arrowhead) and a
  significant reduction of the cyst is observed with widening of
  the subarachnoid space
case_images: 10.1177_2055116920930181-fig4.jpg
case_images: PMC7303770_01_10.1177_2055116920930181-fig4.jpg
case_images: fig4-2055116920930181
case_images: Repeat MRI, 4 days after surgery, revealed a marked reduction of the cyst and adequate placement of the cystoperitoneal shunting device (Figure 4).