<unk>  <unk>  is a medical term referring to a histological variant of malignant tumor arising from the uncontrolled mitosis of transformed cells originating in epithelial tissue (or in cells that display epithelial characteristics) that bear microscopic resemblance to<unk>  (nasopharyngeal carcinoma). There is considerable variation in the classification of<unk> —while it is perhaps most commonly considered a subtype of squamous cell carcinoma, it can also be classified as a form of large cell carcinoma (i.e. when occurring in the lung), and can be considered as a separate, unique entity. In most anatomical sites, many cases are associated with the Epstein–Barr virus. In the breast, the macroscopic, microscopic, epidemiologic, and prognostic features of<unk>  are very similar to medullary carcinoma; EBV status is one differentiator.
Lymphoepithelioma-like carcinoma
Basal-like carcinoma
Epithelial-myoepithelial carcinoma
Sister Mary Joseph nodule
Mammary-type myofibroblastoma
Verrucous carcinoma
Sclerosing epithelioid fibrosarcoma
Anaplastic carcinoma