When GIST cell FGL2 expression was compared with tumour‐infiltrating leukocyte counts in the SSGXVIII series, FGL2 expression was significantly associated with a low tumour infiltrating CD3+ lymphocyte count and a low FoxP3+ lymphocyte count (p = 0.016 and.041 respectively), and tended to be associated with a small CD8+ count and a low CD20+ count (p = 0.065 and 0.051 respectively), whereas no association was found with the CD68+ macrophage count or the NCR1+ cell count (Table 3). Here, FGL2 is linked to gastrointestinal stromal tumor.