Except for ATG4D, the positive expression rates for ATG1, ATG2B, ATG3, ATG4A, ATG4B, ATG4C, and ATG5 showed significant differences between NPC tissues and non-cancerous nasopharyngeal mucosa (P < 0.05) (Table 2). The gene discussed is ATG4C; the disease is nasopharyngeal carcinoma.