. . . . . . . "[Metaplastic carcinoma with pure squamous differentiation is a very rare histological subtype (0.1% of all breast cancers) and is usually ER, PR, and HER2/neu negative by immunohistochemistry.]. Sentence from MEDLINE/PubMed, a database of the U.S. National Library of Medicine."@en . . . . . "2017-02-19"^^ . . "Gene-disease associations inferred from text-mining the literature."@en . "DisGeNET evidence - LITERATURE"@en . "2017-10-17T13:12:29+02:00"^^ . . . . . . . . . . . "v5.0.0.0" . "v5.0.0" .