Also known as: Gastric or Gastroesophageal Junction Adenocarcinoma (GEC) / Gastric and Gastroesophageal Junction (GEJ) Adenocarcinoma / Gastric/Gastroesophageal Junction Adenocarcinoma / Gastric or Gastroesophageal Junction(GEJ) Adenocarcinoma / Gastric Adenocarcinoma and Gastroesophageal Junction Adenocarcinoma / Gastric and Gastroesophageal Junction Adenocarcinoma / Gastric or Gastro-esophageal Junction (GEJ) Adenocarcinoma / Gastric or Gastroesophageal Junction Adenocarcinoma / Gastric, or Gastroesophageal Junction Adenocarcinoma / Gastric or Gastroesophageal Junction (GEJ) Adenocarcinoma / Gastric / Gastroesophageal Junction Adenocarcinoma / Adenocarcinoma of the Stomach / Gastroesophageal