Abstract
We report a case of CA19-9-producing gastric cancer. A 68-year-old man was admitted to the hospital because of abnormality of the stomach by screening. Gastric endoscopy visualized a type 2 lesion on the antrum following the biopsy result of “poorly differentiated adenocarcinoma.” In the preoperative state, the serum level of CA19-9 was 16000 IU/ml (normal<37). Total gastrectomy was performed. Histologically, the lesion revealed poorly-differentiated adenocarcinoma (T2 N1 H0 M0). From the immunohistochemistry, cancer cells were positively-stained for CA19-9. The serum CA19-9 level deceased within the normal range on the postoperative third month. The patient remains alive 12 months after surgery.
