PMC4901817_01
(a) T2 axial and coronal weighted magnetic resonance imaging depicting the preoperative arachnoid cyst located in the left supraorbital region compressing the left optic nerve, optic chiasm, internal carotid artery, and middle cerebral artery. (b) T2-weighted axial and T1 with contrast magnetic resonance imaging taken after left pterional craniotomy following fenestration of the cyst with near complete resolution of the cyst and patient symptoms
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F1
The left optic nerve was also displaced along with the internal carotid artery and middle cerebral artery [Figure 1a]. Postoperative imaging indicated complete resolution of her cyst [Figure 1b].
(a) T2-weighted axial and T1 with contrast coronal magnetic resonance imaging depicting a recurrent arachnoid cyst 3 years after surgical intervention for first cyst. (b) Sequential axial computed tomography images and coronal computed tomography image indicating the location of the cystoperitoneal shunt within the now obliterated cyst. Note: The catheter is not intraparenchymal but rather traveling on the skull base
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F2
Follow-up imaging indicated that the cyst had recurred [Figure 2a]. Her postoperative imaging confirmed resolution of the cyst [Figure 2b].