title: Gastric metastasis as the first manifestation of an invasive lobular carcinoma of the breast.
abstract: Gastrointestinal metastases from breast cancer are rare and generally occur several years after the diagnosis of the primary lesion. The diagnosis of gastric metastasis as the initial presentation of breast cancer is even rarer and can potentially mimic gastric carcinoma. We report the case of a 66-year-old female patient submitted to a total gastrectomy because of the histological diagnosis of undifferentiated gastric carcinoma. During the surgical procedure, biopsies of the peritoneum and the liver were performed, which were consistent with metastatic breast invasive lobular carcinoma (ILC). The primary lesion of the breast was detected during the post-operative period, when a 4-cm-long lesion was detected on physical examination and mammography. The revision of the gastric biopsy confirmed the diagnosis of ILC. The authors call attention to the rarity of gastrointestinal metastases as the initial presentation of breast ILC.
authors.affiliation: Department of Obstetrics and Gynecology - Faculdade de Medicina - Universidade de São Paulo, São Paulo/SP - Brazil .
authors.forename: Maíra Teixeira
authors.initials: MT
authors.lastname: Dória
authors.affiliation: Department of Obstetrics and Gynecology - Faculdade de Medicina - Universidade de São Paulo, São Paulo/SP - Brazil .
authors.forename: Jonathan Yugo
authors.initials: JY
authors.lastname: Maesaka
authors.affiliation: Department of Pathology - Faculdade de Medicina - Universidade de São Paulo, São Paulo/SP - Brazil .
authors.forename: Sebastião Nunes
authors.initials: SN
authors.lastname: Martins
authors.affiliation: Department of Pathology - Faculdade de Medicina - Universidade de São Paulo, São Paulo/SP - Brazil .
authors.forename: Thales Parenti
authors.initials: TP
authors.lastname: Silveira
authors.affiliation: Department of Obstetrics and Gynecology - Faculdade de Medicina - Universidade de São Paulo, São Paulo/SP - Brazil .
authors.forename: Gabriela
authors.initials: G
authors.lastname: Boufelli
authors.affiliation: Department of Pathology - Faculdade de Medicina - Universidade de São Paulo, São Paulo/SP - Brazil .
authors.forename: Sheila Aparecida Coelho
authors.initials: SA
authors.lastname: Siqueira
authors.affiliation: Department of Pathology - Faculdade de Medicina - Universidade de São Paulo, São Paulo/SP - Brazil .
authors.forename: Edmund Chada
authors.initials: EC
authors.lastname: Baracat
authors.affiliation: Department of Pathology - Faculdade de Medicina - Universidade de São Paulo, São Paulo/SP - Brazil .
authors.forename: José Roberto
authors.initials: JR
authors.lastname: Filassi
keywords: Breast Neoplasm; Carcinoma, Lobular; Neoplasm Metastasis