YTHDC2 and cancer: Pan‐cancer analysis has emerged as an important research focus for tumorigenesis and development in recent years, our study presents the significance of YTHDC2 from the perspective of pan‐cancer, including gene expression, genetic alteration, molecular mechanism, immune infiltration, diagnostic value and clinical prognosis, suggesting YTHDC2 may be a promising biomarker for diagnosis and prognosis in certain cancers, and targeting YTHDC2 may provide new thinking to the immunotherapy of individual cancers.