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要旨 食道m3癌,sm癌の手術的切除例379例を臨床病理学的に検討した.m3癌およびsm癌ではリンパ節転移の危険性がみられ,5年生存率での成績においても手術的切除治療がEMRのみの治療よりも上回っての結果がみられ,リンパ節転移の危険度を知る手段の検討が必要であると思われた.5年生存率に大きな影響を与えるリンパ節転移と相関する独立因子としてリンパ管侵襲,腫瘍の深達度,smへ進展する部分の腫瘍の大きさ,matrilysinの発現の有無が関連していた.食道sm癌におけるmatrilysinの発現の有無は独立したリンパ節転移危険因子であるとともに,リンパ管侵襲などの従来からの危険因子に加え,matrilysinの発現の有無を検討することによって,より効率良く食道sm癌におけるリンパ節転移を予見できる可能性が示唆されたが,m癌におけるmatrilysinの発現性は予後判定には関与せず,これは進行癌におけるマーカーとしての役割と考えられた.今回の検討では,リンパ管侵襲の判定の精度を上げる意味でD2-40免疫染色が有効である成績が得られ,matrilysinの発現など分子生物学的な手法はリンパ節転移を予測する他の手段と組み合わせての利用が良いと思われる.
379 examples of surgical excision of m3 cancer and submucosal cancer were examined in clinical pathology. It seemed that the examination of methods of knowing the risk of lymph node metastasis is important because the danger of lymph node metastasis was seen in m3 cancer and submucosal cancer, and the results of the surgical excision method were better from the viewpoint of the 5 year-survival rate than those of the EMR-only method. Lymphatic invasion, depth of invasion of tumor, the tumor size in the part expanding to the submucosa and the expression of matrilysin were related and became an independent factor that had a big effect on the 5 year-survival rate.
The presence of the expression of matrilysin on esophageal submucosal cancer is an independent risk factor of lymph node metastasis. The investigation of the presence of the expression of matrilysin, in addition to risk factors like lymphatic invasion, indicated the possibility of efficient foreseeing of lymph node metastasis in submucosal cancer.
The appearance of matrilysin in mucosal cancer was not regarded as part of the prognosis judgment, but was thought to play a role as a marker of advanced cancer.
In this examination, the result was obtained that D2-40 immuno-stain is effective for improving the accuracy of the judgment of lymphatic invasion, and it seems that using molecular biology techniques such as the expression of matrilysin etc. is better when combined with other means for predicting lymph node metastasis.
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