title: Youngest case of ductal carcinoma in situ arising within a benign phyllodes tumour: A case report.
abstract: BACKGROUND
  Phyllodes tumour (PT) is a rare tumour of the female breast. The tumour clinically and radiologically mimics the features of a fibroadenoma. Ductal carcinoma in situ (DCIS) in the epithelial component of PT is a very rare finding.
  
  
  METHODS
  We present youngest ever case of a 23-year-old nulliparous woman with high-grade ductal carcinoma in situ arising within a benign phyllodes tumor. Macroscopically, it is a homogeneous tumour with solid components. Microscopically, it features typical leaf-like pattern with hypercellular stroma with high-grade ductal carcinoma in situ.
  
  
  CONCLUSIONS
  To date, eight such rare cases of benign phyllodes tumour with ductal carcinoma in situ have been documented. We report the youngest case known in literature so far.
  
  
  CONCLUSIONS
  As this is a very rare presentation, it poses several challenges in regard to both management and follow-up.
authors.affiliation: Department of Breast Surgery, Princess of Wales Hospital, Abertawe Bro Morgannwg University Hospital Trust, Wales, UK. Electronic address: sharat_chopra@hotmail.com.
authors.forename: Sharat
authors.initials: S
authors.lastname: Chopra
authors.affiliation: Department of Breast Surgery, Princess of Wales Hospital, Abertawe Bro Morgannwg University Hospital Trust, Wales, UK.
authors.forename: Vummiti
authors.initials: V
authors.lastname: Muralikrishnan
authors.affiliation: Department of Pathology, Singleton Hospital, Swansea University, Abertawe Bro Morgannwg University Hospital Trust, Wales, UK.
authors.forename: Maurizio
authors.initials: M
authors.lastname: Brotto
keywords: Benign; Ductal carcinoma in situ; Phyllodes tumour; Young age