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Intraductal tubulopapillary neoplasm (ITPN) composed of small, tightly packed glands forming intraductal nodules. The neoplastic cells are cuboidal with no significant mucin. This particular case shows foci of comedo-type necrosis resembling intraductal carcinoma of the breast and it also has an associated invasive carcinoma with perineural invasion (arrows)
