Seshie BK, Kim KH, Lee HJ, Lee SH, Hwang S.  Synchronous Gastric Adenocarcinoma and Perigastric Lymph Node Metastatic Squamous Cell Carcinoma with Unknown Primary: A Case Report.  J Minim Invasive Surg 2020;23:99-102.  https://doi.org/10.7602/jmis.2020.23.2.99