Zusammefassung
Für neuroendokrine Neoplasien (NEN) stehen aufgrund ihrer Expression von Somatostatinrezeptoren für die Diagnostik SPECT- oder PET-Radiopharmaka (Ga-68-markierte Peptide) zur Verfügung. Für die Therapie kommen Lu-177- oder Y-90-markierte Peptide zum Einsatz. Die Peptidrezeptor-Radionuklidtherapie (PRRT) kommt typischerweise bei G1/G2-NEN (Ki-67 < 20 %) im metastasierten und damit inoperablen Stadium nach oder alternierend zu Sandostatin zum Einsatz. Während es für pankreatische NEN chemotherapeutische Therapieoptionen vor einer PRRT gibt, kommt bei extrapankreatischen NEN bevorzugt eine PRRT zur Anwendung. Eine PRRT ist meist nebenwirkungsarm, insbesondere bei Verwendung Lu-177-markierter Peptide. Allerdings sind hämatotoxische und nephrotoxische Nebenwirkungen möglich. Karzinoidkrisen oder myelodysplastische Syndrome sind selten (< 1–2 %). Meist sind mit einer PRRT partielle Remissionen (ca. 40 %) oder eine Krankheitsstabilisierung (ca. 35 %) mit medianen Überlebenszeiten von 46–59 Monaten zu erreichen. Bei prognosebestimmender Lebermetastasierung steht eine selektive interne Radionuklidtherapie (SIRT) mit Y-90-markierten Mikrosphären zur Verfügung.
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Schmidt, M., Cremer, B. & Drzezga, A. Neuroendokrine Tumoren. best practice onkologie 9, 36–46 (2014). https://doi.org/10.1007/s11654-013-0113-6
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DOI: https://doi.org/10.1007/s11654-013-0113-6