A study conducted by Yukio Terashita et al. examined the correlation between the mRNA expression of PPARγ and esophageal cancer prognosis in 55 patients with primary ESCCs and found that PPARγ expression decreased significantly compared with the normal esophageal epithelium; thus, they concluded that the mRNA expression level of PPARγ could be regarded as a prognosis marker for esophageal cancer patients (Terashita et al., 2002). Here, PPARG is linked to esophageal cancer.