Department of Pathology The Fourth Hospital of Hebei Medical University Shijiazhuang 050011 Hebei Province China;
Department of Pathology The Fourth Hospital of Hebei Medical University Shijiazhuang 050011 Hebei Province China;
Department of Pathology The Fourth Hospital of Hebei Medical University Shijiazhuang 050011 Hebei Province China;
Gastric cancer; Mismatch repair proteins; Next-generation sequencing; Sporadic; Family management; Case report;