PDGFRB and thyroid gland papillary carcinoma: Similar associations between high stromal PDGFRβ expression and poor prognosis have also been demonstrated, again by conventional IHC analyses, for other solid cancer types including prostate, gastric, colorectal, pancreatic, oral squamous cell, and thyroid papillary cancers [99–101, 106, 111–114] as well as rhabdomyosarcoma, with the latter indicating that stromal PDGFRβ is also relevant for prognosis in soft tissue sarcomas [103].