title: Lobular carcinoma of the breast with gastrointestinal metastasis.
abstract: We present the case of a 74-year-old woman with metastatic lobular carcinoma with an occult breast primary presenting as a suspected ampullary tumor due to its ampullary metastasis. The patient's clinical presentation is of interest in two aspects. First, lobular carcinoma of the breast metastatic to the ampulla is extremely rare. Second, in the absence of a detectable primary lesion, prior history of malignancy, or distinguishing clinical, radiological, and endoscopic features, histopathological assessments are pivotal for arriving at the appropriate diagnosis and for optimizing treatment.
authors.affiliation: Departments of Hematology/Oncology (Jones) and Clinical Oncology Research (Tong), Charles A. Sammons Cancer Center at Dallas; Baylor Research Institute, Dallas, Texas (Tong); the Departments of Internal Medicine (Jones, Coyle) and Pathology (Mir), Baylor University Medical Center at Dallas; and Texas Oncology PA, Dallas, Texas (Coyle).
authors.forename: Catherine
authors.initials: C
authors.lastname: Jones
authors.affiliation: Departments of Hematology/Oncology (Jones) and Clinical Oncology Research (Tong), Charles A. Sammons Cancer Center at Dallas; Baylor Research Institute, Dallas, Texas (Tong); the Departments of Internal Medicine (Jones, Coyle) and Pathology (Mir), Baylor University Medical Center at Dallas; and Texas Oncology PA, Dallas, Texas (Coyle).
authors.forename: Alex W
authors.initials: AW
authors.lastname: Tong
authors.affiliation: Departments of Hematology/Oncology (Jones) and Clinical Oncology Research (Tong), Charles A. Sammons Cancer Center at Dallas; Baylor Research Institute, Dallas, Texas (Tong); the Departments of Internal Medicine (Jones, Coyle) and Pathology (Mir), Baylor University Medical Center at Dallas; and Texas Oncology PA, Dallas, Texas (Coyle).
authors.forename: Mariam
authors.initials: M
authors.lastname: Mir
authors.affiliation: Departments of Hematology/Oncology (Jones) and Clinical Oncology Research (Tong), Charles A. Sammons Cancer Center at Dallas; Baylor Research Institute, Dallas, Texas (Tong); the Departments of Internal Medicine (Jones, Coyle) and Pathology (Mir), Baylor University Medical Center at Dallas; and Texas Oncology PA, Dallas, Texas (Coyle).
authors.forename: Yvonne
authors.initials: Y
authors.lastname: Coyle