title: Angiosarcoma in previously irradiated breast in patient with Li-Fraumeni syndrome. A case report.
abstract: BACKGROUND
  Li-Fraumeni syndrome is a rare disease with an autosomal dominant inheritance pattern and high penetrance that defines a 50% chance of developing cancer before the age of 30 years, including cases of breast sarcoma. Patients with this syndrome who require radiotherapy have an increased risk of developing secondary malignancies including angiosarcomas.
  
  
  METHODS
  This was a case report on a female patient with Li-Fraumeni syndrome. In October 2005, she was diagnosed with invasive ductal carcinoma of the right breast and underwent sectorectomy. She then received chemotherapy and adjuvant radiotherapy. Trastuzumab and tamoxifen were also part of the treatment. She recently sought care at our hospital, complaining of hyperemia and nodulation in the right breast, and underwent surgical resection that revealed epithelioid angiosarcoma.
  
  
  CONCLUSIONS
  When genetic predisposition due to Li-Fraumeni syndrome is documented, the therapy should be adapted so as to minimize the risk. Thus, conservative surgical treatments should be avoided and mastectomy without radiation should be prioritized. In cases in which use of radiotherapy is justified, patients should be followed up intensively.
authors.affiliation: Faculdade de Medicina, Universidade de Caxias do Sul (FMUCS), Caxias do Sul, Rio Grande do Sul, Brasil.
authors.forename: Oséias Vargas
authors.initials: OV
authors.lastname: Barbosa
authors.affiliation: Department of Oncology, Faculdade de Medicina, Universidade de Caxias do Sul (FMUCS), Caxias do Sul, Rio Grande do Sul, Brasil.
authors.forename: André Borba
authors.initials: AB
authors.lastname: Reiriz
authors.affiliation: Faculdade de Medicina, Universidade de Caxias do Sul (FMUCS), Caxias do Sul, Rio Grande do Sul, Brasil.
authors.forename: Ricardo Antônio
authors.initials: RA
authors.lastname: Boff
authors.affiliation: Faculdade de Medicina, Universidade de Caxias do Sul (FMUCS), Caxias do Sul, Rio Grande do Sul, Brasil.
authors.forename: Willian Passos
authors.initials: WP
authors.lastname: Oliveira
authors.affiliation: Faculdade de Medicina, Universidade de Caxias do Sul (FMUCS), Caxias do Sul, Rio Grande do Sul, Brasil.
authors.forename: Luiza
authors.initials: L
authors.lastname: Rossi
mesh_terms: D000328:Adult; D001943:Breast Neoplasms / Q000209:etiology / Q000473:pathology / Q000532:radiotherapy*; D018270:Carcinoma, Ductal, Breast / Q000532:radiotherapy*; D005260:Female; D016158:Genes, p53; D020022:Genetic Predisposition to Disease; D006394:Hemangiosarcoma / Q000209:etiology* / Q000473:pathology; D006801:Humans; D016864:Li-Fraumeni Syndrome / Q000235:genetics* / Q000473:pathology; D009381:Neoplasms, Radiation-Induced / Q000473:pathology; D018714:Radiotherapy, Adjuvant / Q000009:adverse effects