SLC2A1 and lung adenocarcinoma: This pattern is consistent with previous reports that GLUT1 is expressed at higher levels in poorly-differentiated than in well-differentiated lung tumors [215,217,221], and that in lung adenocarcinoma, high GLUT1 and high FDG uptake are correlated with solid (poorly differentiated) morphology and worse prognosis [216,217,222,223,224].