[Early cancer of the stomach from the viewpoint of lymph node metastasis--relationship between the mucous membrane index of ulcerative tumor and lymph node metastasis].
D005753:Gastric Mucosa / Q000473:pathology*; D006801:Humans; D008207:Lymphatic Metastasis; D013274:Stomach Neoplasms / Q000473:pathology*; D013276:Stomach Ulcer / Q000473:pathology*