title: Gastric and endobronchial metastases in a case of lobular breast cancer.
abstract: BACKGROUND
  Invasive lobular carcinoma (ILC) is the second most common histological type of invasive breast carcinoma, preceded only by infiltrating ductal carcinoma, which has clinical, biological and molecular distinctions. These distinctions imply a different metastatic behavior between the histology of these 2 types of breast cancer.
  
  
  METHODS
  We report the case of a 51-year-old woman with breast cancer with ILC histology, diagnosed at an early stage. In the course of her disease, recurrences in the gastric mucosa and endobronchial area occurred. The treatment she received is described herein.
  
  
  CONCLUSIONS
  This is a case of ILC with unusual metastases. The absence of E-cadherin is related to the carcinogenesis of ILC and probably to these patterns of metastasis as well.
authors.affiliation: Oncology Center, Hospital Sírio-Libanês, Unidade Brasília, Brasília, Brazil.
authors.forename: G S
authors.initials: GS
authors.lastname: Fernandes
authors.affiliation: Instituto do Câncer do Estado de São Paulo, São Paulo, Brazil.
authors.forename: T S
authors.initials: TS
authors.lastname: Corrêa
authors.affiliation: Oncology Center, Hospital Sírio-Libanês, Unidade Brasília, Brasília, Brazil.
authors.forename: E P B
authors.initials: EP
authors.lastname: Carvalho
authors.affiliation: Oncology Center, Hospital Sírio-Libanês, Unidade Brasília, Brasília, Brazil.
authors.forename: A
authors.initials: A
authors.lastname: Katz
authors.affiliation: Oncology Center, Hospital Sírio-Libanês, Unidade Brasília, Brasília, Brazil ; Instituto do Câncer do Estado de São Paulo, São Paulo, Brazil.
authors.forename: P M
authors.initials: PM
authors.lastname: Hoff
keywords: Endobronchial metastasis; Gastric metastasis; Invasive lobular carcinoma; Lobular breast cancer