抄録
In Japan one definition and classification was employed by pathologist, radiologist and endoscopists in 1962. When the cancerous invasion is limited within the mucous and submucous layers, we define as early cancer. Macroscopic classification of early gastric cancer is classified in 5 types. (I. Protruded type, II a. elevated type, II b. flat type, II c. depressed type, III. excavated type.). 150 cases of early gastric cancer have been operated on in the 4 years since the commencement of our hospital in 1962.
Endoscopic feature on 150 cases of early cancer are reported with the following conclusion.
(1) Protruded type is a polypoid carcinoma. A polyp larger than 2cm in its greatest dimension is frequently found malignant. Uneveness of surface, broad base, hemorrhage of polyp suggest malignancy.
(2) Elevated type (II a) is an early carcinoma of low plateau type. This type in its pure form is rare.
(3) Clinical diagnosis of flat type of early cancer was considered to be imposible but recently it has become possible by detecting a zone of fading color and paleness.
(4) Deppressed type is commonest type of early cancer of the sfomach. Characteristic features are an irregular shaped well demarcated shallow mucosal deppression with an uneven hemorrhagic dirty coated surface. Mucosal fold are disrupted at its margin. Diagnosis of this type is usually easy.
(5) The excavated type (III) is very difficult to distinguish from benign ulcer. Most cases have a narrow zone of shallow depression around the deep excavation.
In this report, contribution of gastrocamera in the establishment and development of the increasing accuracy of the diagnosis of early cancer of the stomach was demonstrated. We confidently expect further advances in this field in the near future.
