Among the overexpressed genes, PTGDS (13.761-fold) had the highest log2 fold change in tumor versus non-tumor tissues, followed by TNFRSF18 (13.387-fold), glial fibrillary acidic protein (GFAP) (12.296-fold), BARHL1 (12.175-fold), and KIF26A (11.719-fold). The gene discussed is GFAP; the disease is neoplasm.