Zusammenfassung
Duodenale Adenome treten bei etwa 0,5 % der oberen GI-Endoskopien auf. Sporadische ampulläre und non-ampulläre Duodenal- und Dünndarmadenome, insbesondere in Anwesenheit von niedriggradigen oder hochgradigen intraepithelialen Neoplasien, haben ein malignes Potenzial, ebenso wie neuroendokrine Tumoren (NET) und gastrointestinale stromale Tumoren (GIST). Die familiäre adenomatöse Polyposis (FAP) nähert sich einem 100 %igen Lebenszeitrisiko für Duodenaladenome und einem 40 %igen Risiko für eine fortgeschrittene adenomatöse Polyposis im Alter von 60 Jahren. Daher sollten sporadische Adenome einer endoskopischen Resektion unterzogen werden, ebenso wie multiple Adenome in der FAP, um den Spigelman-Risikoscore zu verringern und eine resektive Chirurgie zu vermeiden. Ein submukosainvasives Karzinom erfordert eine große resektive Chirurgie. Die Vielfalt der Mukosa- und Submukosaveränderungen im Dünndarm erfordert ein diagnostisches Know-how, um Läsionen mit ungünstigem Verlauf, wie Adenome, dysplastische Läsionen, maligne Lymphome, NET und GIST zu identifizieren. Die endoskopische Resektion von hochriskanten Neoplasien wird in spezialisierten endoskopischen Zentren weiterentwickelt.
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Kato, M., Yahagi, N., Ponchon, T. (2023). Duodenum und Dünndarm: Mukosaneoplasien. In: Berr, F., Oyama, T., Ponchon, T., Yahagi, N. (eds) Atlas Frühkarzinome des Gastrointestinaltrakts. Springer, Cham. https://doi.org/10.1007/978-3-031-25623-3_10
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