粘膜下層浸潤の術前推定が困難であったⅡc型早期胃癌の1例

Early Gastric Cancer in Which Preoperative Estimation of Submucosal Invasion was Difficult, Report of a Case

　陥凹型胃癌の深達度診断の指標としては，癌病巣の大きさ，境界鮮明度陥凹の内部および周辺の隆起，粘膜皺襞の性状などが挙げられている^1)～3)．しかし，これらの指標を適用しても，深達度診断が的中しないことが少なくない．

　本稿では，X線・内視鏡検査所見からは粘膜下層に癌浸潤が及んでいることが推定できなかった，Ⅱc型sm癌の1例を報告する．

　A 41-year-old woman with Ⅱc type of early gastric cancer was reported.

　The lesion was located on the anterior wall of the middle part of gastric body. On x-ray film the lesion measured 2.2×1.2 cm in diameter. On x-ray and endoscopic examinations, there were no findings such as clubbed and fused mucosal folds and plateau-like elevation which were suggestive of submucosal cancer invasion. However, histological examination of the resected specimens revealed submucosal invasion of signet-ring cell arccinoma in a scirrhous fashion.