title: [Malignant eccrine poroma].
abstract: BACKGROUND
  Malignant eccrine poroma is a very rare tumour of the sweat glands with high malignancy and presenting with a polymorph clinical and histological picture.
  
  
  METHODS
  We describe the case of a 99-year-old patient with a malignant poroma on the buttock. Despite the large size of the tumour, no metastasis was found with standard examination techniques. Radical excision and defect closure with a Limberg flap was performed.
  
  
  RESULTS
  The healing course was uneventful and without complications.
  
  
  CONCLUSIONS
  The malignant poroma is a tumour of high malignancy which can easily be misdiagnosed because of its different forms of presentation. Radical surgical therapy is the only known effective treatment.
authors.affiliation: Klinik für Plastische, Wiederherstellungs- und Asthetische Chirurgie, Städtische Kliniken Bielefeld, Germany. onno.frerichs@sk-bielefeld.de
authors.forename: O
authors.initials: O
authors.lastname: Frerichs
authors.forename: U
authors.initials: U
authors.lastname: Raute-Kreinsen
authors.forename: S
authors.initials: S
authors.lastname: Brüner
authors.forename: H
authors.initials: H
authors.lastname: Fansa
mesh_terms: D018250:Acrospiroma / Q000175:diagnosis / Q000473:pathology / Q000601:surgery; D000368:Aged; D000369:Aged, 80 and over; D002081:Buttocks; D003937:Diagnosis, Differential; D005260:Female; D006801:Humans; D016038:Skin Transplantation; D013544:Sweat Gland Neoplasms / Q000175:diagnosis / Q000473:pathology / Q000601:surgery; D013545:Sweat Glands / Q000473:pathology; D016896:Treatment Outcome