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Pharma Update Mammakarzinom

Pharmaceutic update breast cancer

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Der Gynäkologe Aims and scope

Zusammenfassung

Der konsequente, nach Rezeptorstatus und HER2-Expression differenzierte Einsatz medikamentöser (neo-)adjuvanter Therapien hat wesentlichen Anteil an der verbesserten Prognose beim operablen Mammakarzinom. Bei rezeptorpositiver Erkrankung sind 5 Jahre endokrine Therapie (Tamoxifen, Aromatasehemmer) Standard, die Verlängerung auf 10 Jahre kann die langfristige Prognose weiter verbessern. Bei der (neo-)adjuvanten Chemotherapie sind Anthrazykline und Taxane erste Wahl, bevorzugt in dosisdichten Regimen. Bei positivem HER2-Status ist die Kombination mit Trastuzumab obligat. Ist eine adjuvante Chemotherapie geplant, soll immer – insbesondere bei HER2-positivem Status und bei TNBC – die Option einer neoadjuvanten Therapie geprüft werden. Für postmenopausale Patientinnen ist die adjuvante Therapie mit Bisphosphonaten möglicherweise von Nutzen. In der metastasierten hormonsensiblen Situation stehen unverändert endokrine Therapien an erster Stelle. In der Second-line-Therapie ergeben sich durch Fulvestrant und durch die Kombination Exemestan/Everolimus neue Optionen. Hinsichtlich der Chemotherapie werden auch in der metastasierten Situation als erstes Taxane oder Anthrazykline eingesetzt. Typische Second-line-Substanzen sind Vinorelbin, Capecitabin und Eribulin. In Risikofällen kann Bevacizumab eine Ergänzung sein. Bei Knochenmetastasen sollen, unabhängig von der spezifischen Tumortherapie, frühzeitig Bisphosphonate oder Denosumab eingesetzt werden. Zur Prävention bei gesunden postmenopausalen Frauen mit erhöhtem Brustkrebsrisiko (10-Jahres-Erkrankungsrisiko über 5 %) können Aromatasehemmer eingesetzt werden. Eine Beratung hinsichtlich des Lebensstils muss in die Nutzen-Risiko-Abwägung einbezogen werden.

Abstract

The improved prognosis of early breast cancer results from the consequent use of systemic (neo) adjuvant therapy that is individually guided mainly by the expression of steroid hormone receptors and HER2. In hormone receptor positive disease, 5 years of endocrine therapy (e.g. tamoxifen or aromatase inhibitors) represents the standard and prolongation up to 10 years may further improve the long-term prognosis. In (neo) adjuvant chemotherapy, anthracyclines and taxanes are the first choice and a dose-dense regimen is an effective option. In HER2 positive disease the combination with trastuzumab is mandatory. If chemotherapy is planned a neoadjuvant regimen should be considered particularly in HER2 positive cancer and triple negative breast cancer (TNBC). In postmenopausal patients, bisphosphonates may be considered as an additional adjuvant therapy. If metastases have been found the use of endocrine treatment is still the first line treatment in hormone sensitive disease. In second line therapy the treatment options are fulvestrant or a combination of exemestane and everolimus. With regard to chemotherapy taxanes and anthracyclines are considered first choice also for metastatic breast cancer and for second line therapy vinorelbine, capecitabine and eribulin are typically employed. In high risk situations, bevacizumab is an additional option. With the occurrence of metastases, bisphosphonates or denosumab should be given independently from any specific treatment. In healthy postmenopausal women with an elevated risk of breast cancer (> 5 % within 10 years), aromatase inhibitors can be given as chemoprevention. Women should be comprehensively advised in order to weigh the risks and benefits of chemoprevention and options for lifestyle changes.

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Einhaltung ethischer Richtlinien

Interessenkonflikt. C. Thomssen weist auf folgende Beziehungen hin: Honorare für Vorträge und Advisory Boards von Amgen, Cellgena, Glaxo Smith Kline, Novartis, Roche, Teva. Dieser Beitrag beinhaltet keine Studien an Menschen oder Tieren.

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Thomssen, C. Pharma Update Mammakarzinom. Gynäkologe 47, 482–489 (2014). https://doi.org/10.1007/s00129-013-3285-9

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