8504/2 Noninfiltrating intracystic carcinoma


ICD-O-3 topography code: C50

This lesion is a variant of papillary carcinoma, characterized by fine fibrovascular cores covered by neoplastic epithelial cells of low or intermediate nuclear grade and surrounded by a fibrous capsule. In the majority of cases, there is no myoepithelial cell layer within the papillae or at the periphery of the lesion.