Representative resected gastric cancer specimens that were immunohistochemically positive and negative for CD47 are depicted in Figure1A. We observed positive expression of CD47 in the tumor cells of 57 out of 115 patients (49.5%), and no significant differences in clinicopathological characteristics between the CD47-positive and CD47-negative cases were observed, except for the tumor locations (data not shown). Here, CD47 is linked to gastric cancer.