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Nodules of 'wet keratin' consisting of keratinous debris. These nodules are readily appreciated by the surgeon and can be identified via the operating microscope at the time of surgical resection [1,11].   histopathology adamantinomatous craniopharyngioma a & b: low power images showing the characteristic solid and cystic architecture of an adamantinomatous craniopharyngioma with focal cholesterol clefts in b. C & d: high power images demonstrating wet keratin and a border of palisaded columnar epithelium. Histopathology adamantinomatous craniopharyngioma smear cytology from an adamantinomatous craniopharyngioma in a, demonstrating viable epithelial cells in b and a characteristic nodule of wet keratin in c (toludine blue staining).     histopathology adamantinomatous craniopharyngioma a sample from a cystic cavity may contain portions of flattened epithelial lining and intra-cystic necrotic squamous debris which grossly resembles machinery oil [11]. The cholesterol rich contents is readily appreciated on cytology preparations with the presence of abundant cholesterol crystals. A biopsy from the tumour- brain interface may show piloid gliosis with numerous rosenthal fibres [1]. Secondary changes include calcification and chronic inflammation. Mouse over the image for further information. Histopathology papillary craniopharyngioma the papillary craniopharyngioma is more frequently a suprasellar lesion with no appreciable disruption in the architecture of the sella on imaging [4]. Histology shows a monomorphous mass of well-differentiated keratinized stratified squamous epithelium lacking surface maturation and undergoing dehiscence to form pseudo papillae with prominent cores of fibrovascular stroma (see image a) [11]. There is no peripheral palisading, wet keratin or calcification (see image b). Occasionally, ciliated epithelium or goblet cells may be seen [1]. Immunohistochemistry immunohistochemistry is not usually employed in the diagnosis of craniopharyngioma as the tumour morphology is distinctive. buy viagra online generic viagra online cheap viagra buy viagra online http://medicaresupplementspecialists.com/pfz-buy-cheap-viagra-mq/ viagra without a doctor prescription generic viagra online viagra without a doctor prescription http://nationalityinworldhistory.net/bsh-buy-generic-viagra-online-jc/ buy generic viagra Nonetheless, squamous epithelium demonstrates positive staining for cytokeratin markers, confirming the epithelial nature of the neoplasm. Ck 7 is most consistently positive [18]. Occasional cases have shown tumour cells with positive staining for anterior pituitary hormone markers, chromogranin a and human chorionic gonadotrophin [1]. Furthermore, oestrogen and progest. "Insert wittiest quote here."

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