Occult Invasive Lobular Carcinoma of Breast Detected by Stomach Metastasis: A Case Report

Abstract

Gastric metastasis or carcinomatosis from primary breast cancer is a rare phenomenon. It is more prevalent in the invasive lobular type of breast cancer, although the most common histologic subtype of breast cancer is the invasive ductal type (1-4). To date, there are only a few case reports demonstrating that gastric metastases were manifested as an initial presentation of invasive lobular breast cancer (5-9). Nevertheless, most of the cases were distant recurrences occurring in patients with breast cancer histories (5-8). As of now, there is only one published case study reporting about gastric metastasis originating from occult breast lobular cancer and its focus was mainly on the distinct immunohistochemical features between primary gastric cancer and metastatic breast cancer (9). Therefore, in our report of a case of invasive lobular breast cancer identified by gastric metastasis, its imaging features, which significantly contributed to the detection of occult breast cancer, were described. CASE REPORT