Craniopharyngioma Classification

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    Schematics illustrating the topographical relationships of the not-strictly-intraventricular type of craniopharyngioma, which corresponds to Type III retroinfundibular in the new classification scheme by Kassam et al. Sagittal (A) and coronal (B) views showing occupation and expansion of the third ventricle floor as caused by the basal part of the lesion. Origin of the lesion from epithelial remnants of the craniopharyngeal duct (C) and progressive phases of its growth at the third ventricle floor (D–F), following the embryonic theory by Ciric and Cozzens. T = tumor; 1 = ependymal layer; 2 = nervous tissue layer; 3 = pia mater; 4 = upper tumoral pole breaking through the ependymal layer; 5 = lower tumoral pole breaking through the pia mater.

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