[Studies on multiple gastric cancer].
D000230:Adenocarcinoma / Q000473:pathology*; D000368:Aged; D002294:Carcinoma, Squamous Cell / Q000473:pathology*; D006801:Humans; D008207:Lymphatic Metastasis; D008297:Male; D008875:Middle Aged; D009378:Neoplasms, Multiple Primary; D013274:Stomach Neoplasms / Q000473:pathology*