A specimen with ≥10% B7-H1-positive tumor cells was classified as B7-H1-positive [22], and 49 of 76 HP-positive specimens (64.5%) were B7-H1 positive, whereas only 7 of 20 HP-negative specimens (35.0%) were found to be B7-H1 positive (Table 1). Here, CD274 is linked to neoplasm.