Zusammenfassung
Hintergrund
Etwa 10–30 % der CUP-Patienten (CUP: „cancer of unknown primary“) entfallen auf eine prognostisch günstige Subgruppe, für die Behandlungspfade definiert sind, die vom allgemeinen Standard einer unspezifischen zytostatischen Therapie abweichen.
Ziel der Arbeit
Es sollen ein praxisorientierter Überblick über Sonderkategorien beim CUP-Syndrom gegeben und praxisrelevantes Hintergrundwissen vermittelt werden.
Methoden
Der Wissensstand der Autoren, der auf langjähriger wissenschaftlicher und praktischer Tätigkeit auf diesem Fachgebiet beruht, wird im Beitrag wiedergegeben.
Ergebnisse
Prognostisch günstige Subgruppen beim CUP-Syndrom beinhalten zum einen lokalisierte Stadien mit kurativer Option, zum anderen verschiedene Sonderkategorien, bei denen eine Therapie gemäß Arbeitshypothese sinnvoll erscheint. Die Prognose dieser Subgruppen, die in dieser Übersicht einzeln diskutiert werden, ist sehr heterogen und reicht von deutlich über 50 % überlebenden Patienten nach 5 Jahren bis zu Kategorien, die zwar historisch zu den günstigen Subgruppen gezählt werden, bei denen aber das Überleben nicht eindeutig besser ist als das unselektierter CUP-Patienten. Bei vielen dieser Subgruppen besteht das Problem, dass die Evidenzlage sowohl hinsichtlich der Prognose als auch der anzuwendenden Diagnostik und Therapie schlecht ist. Als allgemeine Regel erfolgt die Therapie entweder gemäß den Standards, die für die jeweilige Arbeitshypothese gelten, oder, falls ein lokalisiertes Stadium vorliegt, mittels radikaler Resektion und ggf. Radio(chemo)therapie.
Schlussfolgerung
Zu den wichtigsten Aufgaben des Onkologen bei der Versorgung von CUP-Patienten gehört das Erkennen prognostisch günstiger Subgruppen, die von einer spezifischen Therapie profitieren.
Abstract
Background
About 10–30% of all patients with cancer of unknown primary (CUP) belong to a prognostically favourable subgroup for which treatment algorithms differing from the general standard of nonspecific cytostatic therapy have been defined.
Objectives
This review is intended to give a practice-oriented overview over prognostically favourable categories among CUP and provide background information relevant to the practitioner.
Methods
This is an outline of the authors’ knowledge, which is based on long-standing scientific and practical activity within the field of CUP.
Results
Prognostically favourable subgroups among CUP comprise both localised stages with a curative option and various special categories in which a therapy according to a working hypothesis appears sensible. The prognosis of these subsets, which are discussed in this review in detail, is very heterogeneous, spanning from a rate of surviving patients after 5 years clearly exceeding 50% to categories in which, although historically listed among favourable subgroups, survival rates are not unequivocally better than in unselected CUP patients. A problem is that for many of these subgroups, evidence regarding both the prognosis and the recommended diagnostic and therapeutic approaches is poor. As a general rule, therapy either follows the standards defined for the respective working hypothesis or, in case of a localised stage, radical resection and, if sensible, radio(chemo)therapy should be applied.
Conclusion
In the management of CUP patients, one of the most important tasks of the oncologist is the identification of prognostically favourable subgroups benefiting from a specific therapeutic approach.
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H. Löffler und A. Krämer geben an, dass kein Interessenkonflikt besteht.
Dieser Beitrag beinhaltet keine von den Autoren durchgeführten Studien an Menschen oder Tieren.
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Löffler, H., Krämer, A. Prognostisch günstige Subgruppen bei Krebs mit unklarem Primarius. Onkologe 23, 993–999 (2017). https://doi.org/10.1007/s00761-017-0241-7
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DOI: https://doi.org/10.1007/s00761-017-0241-7
Schlüsselwörter
- Neoplasmen mit unklarer Primärlokalisation
- Unbekannte Primärtumoren
- Hypothesengeleitete Therapie
- Tumorstadium
- Immunhistochemie