title: Breast tumor resembling the tall cell variant of papillary thyroid carcinoma: a case report.
abstract: The breast tumor resembling the tall cell variant of papillary thyroid carcinoma is a very unusual mammary carcinoma whose histologic and predominant nuclear features mimic a papillary thyroid carcinoma. We report the case of a 64-year-old woman who presented with a palpable nodule in the right breast. Fine needle aspiration disclosed abundant cellularity with isolated cells, sheets, and papillary formations of epithelial cells with nuclear grooves. Histologically, the neoplastic cells were arranged in a solid to papillary architecture, with follicular-like and cribriform areas. The cells were columnar to cuboidal with eosinophilic cytoplasm, clear chromatin, nuclear grooves, and occasional nuclear pseudoinclusions. Tumor cells were positive for cytokeratins, alpha and beta-estrogen receptors, progesterone receptor, androgen receptor, CEA, and bcl-2. We searched for BRAF mutations with negative results. Recognizing the cytologic and histologic characteristics of these peculiar mammary tumors that mimic thyroid carcinomas can avoid unnecessary clinical investigations.
authors.affiliation: Department of Pathology, Hospital Clínico Universitario, University of Santiago de Compostela, Santiago de Compostela, Spain.
authors.forename: J
authors.initials: J
authors.lastname: Cameselle-Teijeiro
authors.forename: I
authors.initials: I
authors.lastname: Abdulkader
authors.forename: F
authors.initials: F
authors.lastname: Barreiro-Morandeira
authors.forename: C
authors.initials: C
authors.lastname: Ruiz-Ponte
authors.forename: R
authors.initials: R
authors.lastname: Reyes-Santías
authors.forename: E
authors.initials: E
authors.lastname: Chavez
authors.forename: M
authors.initials: M
authors.lastname: Sobrinho-Simões
mesh_terms: D001943:Breast Neoplasms / Q000737:chemistry / Q000175:diagnosis / Q000235:genetics / Q000473:pathology*; D002291:Carcinoma, Papillary / Q000737:chemistry / Q000175:diagnosis / Q000235:genetics / Q000473:pathology*; D004273:DNA, Neoplasm / Q000032:analysis / Q000235:genetics; D003937:Diagnosis, Differential; D005260:Female; D006801:Humans; D007150:Immunohistochemistry; D007633:Keratins / Q000032:analysis; D008875:Middle Aged; D009154:Mutation; D048493:Proto-Oncogene Proteins B-raf / Q000032:analysis / Q000235:genetics; D019253:Proto-Oncogene Proteins c-bcl-2 / Q000032:analysis / Q000235:genetics; D011944:Receptors, Androgen / Q000032:analysis / Q000235:genetics; D011960:Receptors, Estrogen / Q000032:analysis / Q000235:genetics; D011980:Receptors, Progesterone / Q000032:analysis / Q000235:genetics; D013964:Thyroid Neoplasms / Q000737:chemistry / Q000175:diagnosis / Q000235:genetics / Q000473:pathology*
chemical_list: D004273:DNA, Neoplasm; D019253:Proto-Oncogene Proteins c-bcl-2; D011944:Receptors, Androgen; D011960:Receptors, Estrogen; D011980:Receptors, Progesterone; D007633:Keratins; C482119:BRAF protein, human; D048493:Proto-Oncogene Proteins B-raf