INPLASY2022100047 Circulating tumor DNA as a biomarker in selected Solid Tumors: An Evidence Mapping Keywords: ctDNA; MRD; Prognosis; Gastric cancer; Pancreatic cancer; Esophageal cancer; Liver cancer; urothelium carcinoma; head and neck cancer; Ovarian cancer. Download PDF - 2022100047 Review Status: Ongoing