Carbohydrate antigen 19-9-producing gastric carcinoma: A case report

摘要

Carbohydrate antigen 19-9 (CA 19-9) is a tumor marker often elevated in pancreatic and hepatobiliary malignancies. CA 19-9 has also been rarely reported to be a marker of digestive tract malignancies. We report a case of CA 19-9-producing gastric cancer with a markedly high serum CA 19-9 level (52 862 U/mL). Immunohistochemical staining of the biopsy specimen was positive for CA 19-9. Patient received palliative chemotherapy but expired due to disease progression. Elevated CA 19-9 in gastric cancer is relatively rare and is correlated with poor prognosis.