GC-MSC are positive for CD13, CD29, CD44, CD73, CD90 and CD105, but negative for CD14, CD31, CD34, CD38, CD45, CD71, CD133 and HLA-DR, among which the expression of CD105 was strongly associated with the poor prognosis of GC patients (12, 32–34). The gene discussed is PECAM1; the disease is gastric cancer.