Figure 4From: High-risk human papillomavirus (HPV) DNA sequences in metaplastic breast carcinomas of Mexican women A case of human papillomavirus ( HPV )- negative metaplastic breast carcinoma is shown. Brown colouration of neoplastic cell membranes denotes extensive Epidermal growth factor receptor (EGFR) immunoreactivity (anti-EGFR antibody, clone DAK-H1-1197). (Immunohistochemistry [IHC]; Original magnification 200×).Back to article page