PVR and clear cell sarcoma: The expression level of CD155 was also significantly higher in MFH compared with the other tumor types (P<0.01), including rhabdomyosarcoma (n=3), clear cell sarcoma (n=2), alveolar soft part sarcoma (ASPS) (n=2), Ewing’s sarcoma (n=1), extraskeletal myxoid chondrosarcoma (n=1), leiomyosarcoma (n=1), malignant granular cell tumor (n=1), infantile fibromatosis (n=1), mixofibrosarcoma (n=1) and solitary fibrous tumor (n=1).