LRP1 and bladder transitional cell carcinoma: The expression pattern of LRP1 in BLCA revealed by immunohistochemical assays further indicated that LRP1 expression covered the stromal fibroblastic area, and a high level of LRP1 expression accompanied an increased number of fibroblastic tissues in BLCA, indicating the involvement of LRP1 in stromagenesis which significantly added to the heterogeneity of the TME.