Breast Cancer

, Volume 17, Issue 4, pp 303–305 | Cite as

C-kit-positive gastric metastasis of lobular carcinoma of the breast masquerading as gastrointestinal stromal tumor

  • Bharathi Vennapusa
  • Sarah A. Oman
  • Gulshan Parasher
  • Lisa A. Cerilli
Case Report

Abstract

A 61-year-old woman with no significant past history underwent gastric biopsies demonstrating a strongly c-kit-positive epithelioid malignancy, initially thought to represent gastrointestinal stromal tumor (GIST). Subsequent clinical and immunohistochemical evaluation proved the neoplasm to represent metastatic lobular carcinoma. This case illustrates that although c-kit is highly specific and sensitive for GIST, its expression may occur in a variety of other neoplasms, some of which morphologically resemble GIST and may present in the gastrointestinal tract as metastases. Therefore, a review of other c-kit-positive lesions is also highlighted.

Keywords

Breast cancer Gastric metastasis C-kit Infiltrating lobular carcinoma Gastrointestinal stromal tumor (GIST) 

Abbreviations

C-kit (c-kit protein, c-kit receptor)

C-kit proto-oncogene/CD117

GIST

Gastrointestinal stromal tumors

GCDFP-15

Gross cystic disease fluid protein

GI

Gastrointestinal

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Copyright information

© The Japanese Breast Cancer Society 2009

Authors and Affiliations

  • Bharathi Vennapusa
    • 1
  • Sarah A. Oman
    • 1
  • Gulshan Parasher
    • 2
  • Lisa A. Cerilli
    • 1
  1. 1.Department of PathologyUniversity of New Mexico, MSC08 4640AlbuquerqueUSA
  2. 2.Division of Gastroenterology and Hepatology, Department of Internal MedicineUniversity of New Mexico, MSC08 4640AlbuquerqueUSA

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