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 . 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 . 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 . 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) . There is no peripheral palisading, wet keratin or calcification (see image b). Occasionally, ciliated epithelium or goblet cells may be seen . Immunohistochemistry immunohistochemistry is not usually employed in the diagnosis of craniopharyngioma as the tumour morphology is distinctive. buy viagra onlinegeneric viagra onlinecheap viagrabuy viagra onlinehttp://medicaresupplementspecialists.com/pfz-buy-cheap-viagra-mq/viagra without a doctor prescriptiongeneric viagra onlineviagra without a doctor prescriptionhttp://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 . Occasional cases have shown tumour cells with positive staining for anterior pituitary hormone markers, chromogranin a and human chorionic gonadotrophin . Furthermore, oestrogen and progest. "Insert wittiest quote here."