PRR7 and bladder transitional cell carcinoma: Taken together, we concluded that PRR7-AS1 expression was negatively linked to immune score, stromal score, and ESTIMATE score in 13 tumor types: ACC, BLCA, COAD, GBM, KIRP, LGG, LUSC, OV, PAAD, READ, SARC, SKCM, and STAD.