title: Aspiration biopsy of pleomorphic lipoma of the breast. A case report.
abstract: BACKGROUND
  It is well known that subcutaneous lumps in the breast may create diagnostic confusion. We report, for the first time in the cytologic literature, the features of a pleomorphic lipoma in the breast.
  
  
  METHODS
  Pleomorphic lipoma of the breast was aspirated, showing typical floret cells and mononuclear, hyperchromatic cells with scalloped nuclei, masquerading as malignancy.
  
  
  CONCLUSIONS
  Pleomorphic lipoma has rather typical cytologic features that may allow its recognition when they are present in the proper clinical setting. This report illustrates another diagnostic pitfall in fine needle aspiration biopsy of the breast.
authors.affiliation: Department of Pathology, Hospital Universitario 12 de Octubre, Madrid, Spain.
authors.forename: F
authors.initials: F
authors.lastname: López-Ríos
authors.forename: N
authors.initials: N
authors.lastname: Alberti
authors.forename: A
authors.initials: A
authors.lastname: Pérez-Barrios
authors.forename: P P
authors.initials: PP
authors.lastname: de Agustín
mesh_terms: D001707:Biopsy, Needle; D001943:Breast Neoplasms / Q000473:pathology*; D002467:Cell Nucleus / Q000473:pathology; D005260:Female; D006801:Humans; D008067:Lipoma / Q000473:pathology*; D008875:Middle Aged