title: Metastasis of cutaneous malignant melanoma to angiolipoma: the tumor-to-tumor metastasis phenomenon.
abstract: BACKGROUND
  Although the phenomenon of tumor-to tumor metastasis is not rare, it has been reported in only eight cases with malignant melanoma as the primary tumor.
  
  
  METHODS
  This case describes a patient with cutaneous malignant melanoma that metastasized to an angiolipoma. To our knowledge this is the second case of a malignant melanoma metastasizing to another primary cutaneous tumor and the first to do so in a lipoma.
  
  
  CONCLUSIONS
  In this report we present the clinical and histopathologic features of this special case and review the relevant literature.
authors.affiliation: Department of Pathology, 12 de Octubre University Hospital, Madrid, Spain.
authors.forename: Soledad
authors.initials: S
authors.lastname: Alonso
authors.forename: José Luis
authors.initials: JL
authors.lastname: Rodríguez-Peralto
authors.forename: Gustavo
authors.initials: G
authors.lastname: Pérez-Espejo
mesh_terms: D000328:Adult; D018206:Angiolipoma / Q000473:pathology*; D006801:Humans; D008297:Male; D008545:Melanoma / Q000556:secondary*; D016609:Neoplasms, Second Primary; D012878:Skin Neoplasms / Q000556:secondary*