PMC4533456_01
Pre- and postoperative sagittal 3-tesla magnetic resonance (MR) images. T1-weighted (A), Gd-enhanced (B), and T2-weighted (C) MR images showing the cystic lesion between the anterior and posterior pituitary lobes. The infundibular recess was elevated by the cyst and there was no connection between the third ventricle and the sellar cyst.
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F1
T1-weighted image and high signal intensity on T2-weighted image. The optic chiasm was slightly elevated by the cystic mass located between the anterior and posterior pituitary lobes (Fig. 1A-C).
Intraoperative endoscopic view. A small hole (*) existed above the sella turcica. A hole was identified over the sella turcica probably connecting the sellar cyst and infundibular recess. There was a thin membrane (arrowheads) covering the hole totally and no laceration of the membrane was detected. However, the membrane covering the hole might be partially lacerated intraoperatively at the first operation.
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F2
A hole was identified over the sella turcica probably connecting the sellar cyst and infundibular recess (Fig. 2).
Postoperative computed tomography scan obtained immediately after surgery disclosed air accumulation. Note that air accumulated only in the sellar and suprasellar region, the third ventricle and lateral ventricle.
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F3
A computed tomography (CT) scan obtained immediately after surgery disclosed accumulation of air in the third and lateral ventricles in addition to the intra- and supra-sellar region (Fig. 3).
Postoperative sagittal T1-weighted (A) and T2-weighted magnetic resonance image (B) seemed to demonstrate the channel in the tubular pituitary stalk, which was considered to be PEIR (arrowheads). PEIR: persisting embryonal infundibular recess.
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F4