Accordingly, WSA analysis indicated that PDGF-A expression was significantly different between tumor and disease-free tissues (p(t) = 0.06; p(WRS)<0.05) but not between tumor adjacent and disease-free tissues (p(t) = 0.12; p(WRS) = 0.13) for expression levels above the median (Fig. 4A). The gene discussed is PDGFA; the disease is neoplasm.