Histology Report:

MACROSCOPIC DESCRIPTION: "Brain tissue for histo": An aggregate of friable pale/light brown pearly tissue fragments in total 50x50x5mm with fragments up to 20mm. 

MICROSCOPIC DESCRIPTION: The sections show sheets of anuclear squamous epithelium and hyperkeratosis with some whorled architecture. There are no viable keratinocytes and there are occasional foci of fibroblasts, inflammatory cells and haemosiderin laden macrophages. There are no adnexal components. There is no brain parenchyma and there is no evidence of malignancy.

DIAGNOSIS: Brain tissue: Anuclear keratin debris consistent with epidermoid cyst.