Clinicopathological Studies of Gastric Cancers with Similar Gross findings to Early Gastric Cancer

概要

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Among 437 resected gastric cancer patients, there are 52 cases with similar gross findings to early gastric cancer; IIc similar type 21, IIc+III similar type 6, III similar type 5, IIc+IIa similar type 18, and ha or I similar type 3.1) There are 4 cases whose tumor-size is less than 4cm and cancer invasion has extended into serosal layer of the gastric wall.2) The incidence of lymphnode metastasis of 52 cases is 32.7% (17 cases), showing higher rate than that of early gastric cancer (5.8%) and lower than that of advanced cases (71.5%).3) The relation of pattern of carcinomatous invasion to the survival-rate was correlative in our cases. Three cases of nine who died within five years after operation had small tumors less than 4cm in diameter with penetrating growth pattern.4) Macroscopic appraisal of depth of carcinomatous invasion is such as nodular swelling and fusion of the folds and circular mucosal elevation at the edge of IIc lesion: rugged surface and stiffen and thicken wall of the lesion in IIc similar type. In IIa or I similar type, various extent of erosion and ulceration of the mucosa suggests the deep invasion of cancer. However, macroscopic differenciation of depth of cancer invasion in III similar cases was occasionally difficult.
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