広基性であることからsm浸潤が否定できなかったⅠ型早期胃癌の1例

Ⅰ Type of Mucosal Gastric Cancer of Which Broad Base Suggested Submucosal Infiltration, Report of a Case

　隆起型胃癌の深達度診断の根拠は，大きさ，表面の性状と共に，起始部の性状，すなわち有茎性か広基性かということにある．一般に広基性のものは深達度が深いとされている¹⁾²⁾．しかし，明確な基準がないため，深達度の判定が困難な症例も少なくないのが現状である．

　本稿では，広基性でありながら深達度mであったⅠ型早期癌を呈示する．

　A 70-year-old woman with Ⅰ type of early gastric cancer is reported. On x-ray examination the diameter of the lesion was about 2 cm and there was no ulcer formation. On endoscopy there was no marked nodularity on the surface. These findings suggested mucosal cancer, however, bridging fold-like appearance on x-ray films and horseback-like appearance on endoscopy made us think of possibility of submucosal cancer. Histological examination of the resected specimen proved the lesion to be mucosal cancer.