PMC2796229_01
(a) Preoperative sagittal contrast-enhanced T1-weighted MRI demonstrating a ring-enhancing mass in the sella extending to the suprasellar legion. (b) Brain CT scan performed when the CSF rhinorrhea occurred (19 days after the operation) showing pneumocephalus. (c) MRI scan performed at the same time revealing no recurrence of abscess.
CRM2009-189304.001.jpg
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fig1
The radiological study showed an intrasellar mass with ring-enhancement compressing the optic chiasm on MRI (Figure 1(a)). The emergency computerized tomography revealed the presence of air in the lateral ventricles (Figure 1(b)). MRI revealed no findings of recurrent abscess (Figure 1(c)).
PMC2796229_02
(a) Preoperative coronal contrast-enhanced T1-weighted MRI demonstrating a ring-enhanced mass in the sella. (b) A photomicrograph of aspiration cytology of the pus obtained during the surgery in case 2, demonstrating a cluster of neutrophils: Papanicolaou stain, scale bar; 100 mum. (c) A photomicrograph of a histological cross section from the capsule of the abscess. The capsule of the abscess was the collagen-rich layer (parenthesis). Ciliated columnar epithelium indicating Rathke cleft cyst was not present in any specimens obtained during surgery: H and E staining, scale bar; 200 mum.
CRM2009-189304.002.jpg
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fig2
A radiological examination revealed that she had a cystic mass in the sella (Figure 2(a)). Intraoperative cytological examination showed that the pus contained numerous neutrophils (Figure 2(b)). The cyst wall obtained intraoperatively was collagen (Figure 2(c)), which was consistent with the abscess capsule.