Cystic craniopharyngioma

Various methods for incorporating radioactive rhenium into suitable particles have been introduced. The earliest example is the use of 186Re-labeled sulfur colloid for radiation synovectomy. Commercial preparations for this application have been available for many years (CIS, France, 1987 catalog). 186Re-sulfur colloid has been used for endocavi-tary irradiation of cystic craniopharyngiomas, where irradiation of surrounding tissue is a risk that must be avoided [155]. 

Poor sampling of cystic craniopharyngioma may yield a few epithelial cells of unknown origin. In such cases, lack of cytokeratins 8 and 20 favor craniopharyngioma over epithelial cysts common in the same location. Craniopharyngiomas express more high molecular weight keratin than most carcinomas metastatic to brain (Fig. 20.57). 

Cysts differ from tumors in their lack of a solid nodule of tissue. This simple fact is critical to distinguishing glial cysts from gliomas and epithelial cysts from cystic craniopharyngiomas. Cysts specific to nervous tissue are emphasized here. Others are described in their primary chapters. 

Kickingereder P et al (2012) Intracavity brachytherapy using sterotactically applied phosphorus-32 colloid for treatment of cystic craniopharyngiomas in 53 patients. J Neurooncol 109 365-374. doi 10.1007/s 11060-012-0902-8... 

Cystic Wall of adamantinomatous or incompletely craniopharyngioma keratinized squamous epithelium cyst contains "motor oil" Cytokeratin (-r) Suprasellar sella... 

Classical craniopharyngioma is a cystic tumor containing a clear yellowish or brownish fluid, and stuffed with dispersed solid gray nodules, which may accumulate cho-lesteroid material or be calcified... 

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