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Malignant craniopharyngioma in two cats: histopathological findings
Malignant craniopharyngiomad are rare neoplasias which are described in different animal species. This recently published case report describes the unique histopathological findings of this neoplasia. Very interesting!

Tumors at the cranial base in 2 cats (a 9-year-old, castrated male Chinchilla and a 7-year-old, castrated male American Shorthair) were diagnosed as malignant craniopharyngioma.

The tumor lesion was histopathologically divided into four parts: 1) a small acinus part, in which relatively large cells with a pale cytoplasm composed small acini; 2) a duct part, in which small cuboidal cells composed ducts; 3) a cyst part, in which there were large cysts lined with flat cells; and 4) a pavement part, in which large multiangular-shaped cells proliferated in a pavement pattern.

The epithelial cells of some parts were positive for keratin by immunohistochemistry.

Histopathologic findings of the present feline cases were identical to those of malignant craniopharyngioma in other animal species.


Source: T. Nagata, et al (2005): Two Cases of Feline Malignant Craniopharyngioma. In: Vet Pathol 42:663-665 (2005)



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SMALL ANIMAL PRACTICE

Determining the origin of hepatic masses in dogs by CTmembers
Can CT scans diagnose the anatomical origin of hepatic masses? A very interesting question! The objective of this study was to identify CT features of canine hepatic masses that could be used to determine their divisional or lobar origin.

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