PMC5306994_01
(a) Nonenhanced axial section at the level of the foramen of Monro: a well-defined, round, hyperdense lesion causing mild prominence of bilateral lateral ventricles. (b) Contrast enhanced image shows no significant enhancement in the lesion.
CRIRA2017-2467085.001.jpg
PMC5306994_01_CRIRA2017-2467085.001.jpg
fig1
No significant enhancement appeared after intravenous contrast injection (Figures 1(a) and 1(b)).
PMC5306994_02
(a) Axial T2WI images: a well-defined, round, isointense lesion to the gray matter at the level of the foramen of Monro causing moderate acute hydrocephalus. (b, c) FlAIR and T1WI: the lesion is hyperintense relative to brain parenchyma. (d) T2* GRE images: no drop of signal to indicate intralesional hemorrhage.
CRIRA2017-2467085.002.jpg
PMC5306994_02_CRIRA2017-2467085.002.jpg
fig2
Subtle enhancement of the lesion was seen on postcontrast images (Figures 2 and 3).
(a) TIWI + C: subtle enhancement after intravenous gadolinium injection. (b & c) No elevated diffusion pattern.
CRIRA2017-2467085.003.jpg
PMC5306994_02_CRIRA2017-2467085.003.jpg
fig3
Subtle enhancement of the lesion was seen on postcontrast images (Figures 2 and 3).