PMC4392549_01
(a) Contrast axial T1-weighted brain MRI showed a large left CP angle acoustic neuroma with brain stem compression. (b) The axial brain CT showed left periauricular pseudomeningocele 2 weeks after the operation
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F1
Brain magnetic resonance imaging (MRI) showed a large left CP angle mass; based on this finding, we suspected this to be acoustic neuroma [Figure 1a]. Brain computer tomography (CT) showed fluid collection in the region of the left parietal-occipital scalp [Figure 1b].
(a) One month later after operation, the axial brain CT showed a large left cerebellar cyst that communicated with a pseudomeningocele and severely compressed the brain stem. (b) The axial T1-weighted enhanced image of brain MRI showed a smaller cerebellar cyst after pseudomeningocele repair
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F2
Brain CT showed a left cerebellar cyst, which communicated with a pseudomeningocele that severely compressed the brain stem and had induced obstructive hydrocephalus [Figure 2a]. Postoperatively, the patient regained her clarity of consciousness, and a follow-up brain MRI [Figure 2b] revealed a smaller cerebellar cyst and the absence of pseudomeningocele.