PMC3589850_01
Midline T2W image showing intrasphenoidal meningo-encephalocel comprised of extension of the infundibular portion of the floor of the 3rd. ventricle and remnants of the pituitary gland herniating into the sphenoid sinus through a defect in the floor of the sella tursica
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F1
Brain magnetic resonance imaging (MRI) revealed intrasphenoidal meningocystocele with infandibular recess descending into the meningocele and no other brain anomaly [Figure 1].
PMC3589850_02
(a) T1W image showing CSF existing within the sella and extending into the sphenoid sinus through a possible defect located in the left lateral side of the sinus cavity, (b) and (c) contrast enhanced T1W images in horizontal and coronal views showing herniation of the glial tissue along with the arachnoidal pouch through the Sternberg's canal (white arrow), (d) and (e) T2W images in horizontal, coronal and sagittal views showing empty sella containing CSF and CSF containing cyst within the sella, (f) white arrow denoting extension of the glial tissue into the sella via the Sternberg's canal, (g) and (h) metrizamide CT cisternography in sagittal and coronal views showing CSF containing cavity both within the sella and the sphenoid cell
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F2
In MRI, the sella was enlarged and filled with CSF compatible with the pattern of empty sella [Figure 2a-d, f, and g]. This mass contained tissue resembling extension of glial tissue of the temporal lobe extending into the cyst [Figure 2a-c and e]. Metrizamide CT cisternography identified an intrasphenoidal meningocele located in the left side of the sinus resembling persistence of open Sternberg' canal connecting the subarachnoid cistern of the medial temporal region into the cyst [Figure 2h].