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要旨●扁平上皮癌,腺癌を除く食道腫瘍の中の,類基底細胞癌,癌肉腫,腺扁平上皮癌,神経内分泌細胞癌,粘表皮癌を取り上げ解説した.これらは食道悪性腫瘍全体の10%にも満たない比較的まれな腫瘍である.これら特殊な食道腫瘍は病理組織学的多様性に富む腫瘍であり,扁平上皮癌や腺癌の併存率も高い.それゆえ生検を施行しても治療前に最終診断に至らないことがある.しかし,それぞれの腫瘍は肉眼的に粘膜下腫瘍様形態を示すなど,詳細にみれば臨床病理組織像が通常型扁平上皮癌と異なるため,切除検体では慎重に鑑別診断を進め,適正な治療に導くことが重要である.
Herein, we described the clinicopathological characteristics of esophageal tumors including basaloid squamous carcinoma, carcinosarcoma, adenosquamous carcinoma, neuroendocrine carcinoma, and mucoepidermoid carcinoma, except for squamous cell carcinoma and adenocarcinoma. These tumors are relatively rare, accounting for <10% of all esophageal tumors. These tumors show histopathological diversity, and they frequently coexist with squamous cell carcinoma or adenocarcinoma. Therefore, biopsy may not lead to a final diagnosis, and it is sometimes difficult to make a correct diagnosis before treatment. However, given the different characteristics of each tumor, it is important to diagnose these carefully based on resected specimens to administer appropriate treatment.
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