title: Dermatofibrosarcoma protuberans of the breast.
abstract: BACKGROUND
  Dermatofibrosarcoma protuberans is an uncommon, locally aggressive but rarely metastasizing tumor of the deep dermis and subcutaneous tissue. It may occur at almost any site but is most common in the trunk and extremities. Dermatofibrosarcoma protuberans of the breast has been rarely reported.
  
  
  METHODS
  A 49-year-old woman without a significant medical history presented with a right breast mass that had been present for more than 10 years. Recently, progressive enlargement of the mass was noted. Physical examination showed a firm, well-defined, non-tender, mobile, erythematous 2 x 2 cm mass in the upper outer part of the right breast. Breast sonography showed a 2.3 x 1 cm slightly heteroechoic nodule with uneven anterior contours located in the dermal layer, highly suggestive of a dermal lesion. Wide excision of the mass was performed. Microscopically, the hypercellular tumor was composed of relatively monomorphic spindle cells forming a storiform pattern around the sweat glands of the deep dermis and the subcutaneous fat vacuoles. The tumor cells showed strong immunoreactivity for CD34. The final histological diagnosis was dermatofibrosarcoma protuberans.
  
  
  CONCLUSIONS
  Dermatofibrosarcoma protuberans of the breast, though uncommon, does exist. With the awareness of this entity can a prompt diagnosis be made and the disease be properly managed.
authors.affiliation: Department of Surgery, Chang Gung Memorial Hospital, Kaohsiung Medical Center College of Medicine, Chang Gung University, Niao-Sung Hsiang, Kaohsiung Hsien, Taiwan.
authors.forename: Jong-Yueh
authors.initials: JY
authors.lastname: Lin
authors.forename: Shyr-Ming
authors.initials: SM
authors.lastname: Sheen-Chen
authors.forename: Wayne
authors.initials: W
authors.lastname: Hsu
authors.forename: Chao-Cheng
authors.initials: CC
authors.lastname: Huang
authors.forename: Sheung-Fat
authors.initials: SF
authors.lastname: Ko
authors.forename: Hock-Liew
authors.initials: HL
authors.lastname: Eng
mesh_terms: D018952:Antigens, CD34 / Q000378:metabolism; D001943:Breast Neoplasms / Q000000981:diagnostic imaging / Q000473:pathology* / Q000601:surgery; D018223:Dermatofibrosarcoma / Q000000981:diagnostic imaging / Q000473:pathology* / Q000601:surgery; D005260:Female; D006801:Humans; D008875:Middle Aged; D012878:Skin Neoplasms / Q000000981:diagnostic imaging / Q000473:pathology* / Q000601:surgery; D014463:Ultrasonography
chemical_list: D018952:Antigens, CD34