Metastatic Invasive Lobular Breast Carcinoma Mimicking Synchronous Breast and Gastric Cancers

Metastatic lobular carcinoma to stomach is seen as small round cells in linear cords within the normal tissue and it is not easily differentiated from signet cell adenocarcinoma of the stomach. Differentiating synchronous primary gastric carcinoma from metastatic involvement is vital in accurately planning treatment. Herein, we report a case of gastric metastatic invasive lobular breast carcinoma initially misdiagnosed as synchronous gastric and breast carcinoma and discuss the diagnostic and therapeutic challenges.