表面型表層拡大型食道癌の深達度診断―X線の立場から

Radiological Diagnosis of Depth of Invasion in Superficial Spreading Type of Esophageal Carcinoma

要旨　表面型表層拡大型食道癌25例を対象に，X線造影検査による深達度診断について検討を行った．これまでに報告した側面変形による深達度診断に当てはめると，A群13例はB1～B2型変形であり，ピンポイントに浸潤する部位を正確に診断できなかった．B群は12例存在し，T1b-SM2以深の7例中3例は側面変形から診断可能であったが，それ以外はB2型までの変形であり，A群と同様にピンポイントで浸潤する症例は診断困難であった．0-I型を伴う混合型病変7例は従来どおりの側面変形による診断で十分に対応可能であった．

　The present study investigated the radiological diagnosis of the depth of invasion in 25 cases of superficial spreading type of esophageal carcinoma. Thirteen cases in Group A showed type B1 or B2 deformation on the lateral view, but the area of spread could not be precisely identified. Group B included 12 cases, and the depth of invasion could be determined based on deformation on the lateral view in 3 of 7 cases of carcinoma in the deep sub-mucosal layer. However, for Group A, where the area of spread could not be identified, an assessment of depth was difficult. Overall, it was possible to diagnose the depth of invasion in 7 cases with stage 0 or I cancer based on deformation on the lateral view precisely as before.