title: Gastric choriocarcinoma; an immunohistochemical study.
abstract: A case is reported of primary gastric choriocarcinoma occurring in a 73-year-old man, associated with a high serum level of beta hCG. Both primary and lymph node metastases contained exclusively cyto and syncytiotrophoblastic elements. Immunohistochemical localization of chorionic gonadotropin (hCG), placental lactogen (hPL) and pregnancy-specific glycoprotein (SP 1) is described in relation to cytotrophoblastic differentiation. An intramucosal focus of adenocarcinoma supports the hypothesis of the origin of choriocarcinoma from usual gastric cancer.
mesh_terms: D000368:Aged; D002822:Choriocarcinoma / Q000032:analysis / Q000473:pathology*; D006063:Chorionic Gonadotropin / Q000032:analysis*; D018997:Chorionic Gonadotropin, beta Subunit, Human; D006801:Humans; D007124:Immunoenzyme Techniques; D008297:Male; D010446:Peptide Fragments / Q000032:analysis*; D010928:Placental Lactogen / Q000032:analysis; D011257:Pregnancy Proteins / Q000032:analysis*; D011268:Pregnancy-Specific beta 1-Glycoproteins / Q000032:analysis / Q000378:metabolism; D013274:Stomach Neoplasms / Q000032:analysis / Q000473:pathology*
chemical_list: D006063:Chorionic Gonadotropin; D018997:Chorionic Gonadotropin, beta Subunit, Human; D010446:Peptide Fragments; D011257:Pregnancy Proteins; D011268:Pregnancy-Specific beta 1-Glycoproteins; D010928:Placental Lactogen