title: Glycogen-rich clear cell carcinoma of the breast.
abstract: BACKGROUND
  Glycogen-rich carcinoma of the breast is a rare histological subtype of breast cancer, usually reported to have poor prognosis.
  
  
  METHODS
  We present the case of a 59-year-old woman who underwent a mastectomy for a 3.5 cm clinically palpable left breast carcinoma, originally diagnosed as fibroadenoma on a screening mammogram four years before presentation. Diagnosis of clear cell carcinoma was based on certain histological characteristics of the tumour and immunohistochemical analysis (PAS staining, keratins AE1/AE3, EMA, cytokeratin 7, cytokeratin 20, melanosomes, vimentin, Chromogranin, Synaptophysin, S-100, SMA). No lymph node metastasis was found and as the tumour was ER positive and PgR negative, patient was treated only with an aromatase inhibitor upfront and remains free of disease 48 months now since operation.
  
  
  CONCLUSIONS
  Glycogen-rich clear cell carcinoma of the breast is a rare tumor, its clinical behavior reported to be rather aggressive so far, might varies depending on special characteristics such as low grade and strongly positive ER expression.
authors.affiliation: Breast Unit, 2nd Propedeutic Department of Surgery, Athens University Medical School, Greece. cmarkop@hol.gr
authors.forename: Christos
authors.initials: C
authors.lastname: Markopoulos
authors.forename: Dimitris
authors.initials: D
authors.lastname: Mantas
authors.forename: T
authors.initials: T
authors.lastname: Philipidis
authors.forename: Efstatios
authors.initials: E
authors.lastname: Kouskos
authors.forename: Zoi
authors.initials: Z
authors.lastname: Antonopoulou
authors.forename: Ml
authors.initials: M
authors.lastname: Hatzinikolaou
authors.forename: Helen
authors.initials: H
authors.lastname: Gogas
mesh_terms: D018262:Adenocarcinoma, Clear Cell / Q000737:chemistry / Q000473:pathology*; D001943:Breast Neoplasms / Q000737:chemistry / Q000473:pathology*; D005260:Female; D006003:Glycogen / Q000032:analysis*; D006801:Humans; D008207:Lymphatic Metastasis; D008875:Middle Aged
chemical_list: D006003:Glycogen