@phdthesis{Weiss2021,
  author    = {Weiß, Claire Rachel},
  title     = {Einfluss adjuvanter Therapien des initial hormonrezeptorpositiven Mammakarzinoms auf die Entwicklung einer Rezeptorkonversion im Rezidiv},
  doi       = {10.25972/OPUS-22181},
  url       = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-221814},
  school      = {Universit{\"a}t W{\"u}rzburg},
  year      = {2021},
  abstract  = {In der vorliegenden Arbeit erfolgte eine retrospektive Auswertung der Daten von 2078 Patienten mit Erstdiagnose eines prim{\"a}r hormonrezeptorpositivem Mammakarzinoms, bez{\"u}glich der Entwicklung einer Rezeptorkonversion im Rezidiv. 196 Frauen entwickelten ein Rezidiv, wovon 29,1\% eine Rezeptorver{\"a}nderung im {\"O}strogen-, Progesteron-, oder HER2-neu-Rezeptor zeigten. Ein niedriger Tumordifferenzierungsgrad und eine axill{\"a}re Lymphknotenbeteiligung zeigten ein erh{\"o}htes Risiko f{\"u}r das Auftreten einer Rezeptorkonversion. Eine pr{\"a}menopausale Tamoxifentherapie oder die Applikation einer Chemotherapie war mit einem geringerem Risiko f{\"u}r die Entwicklung eines {\"o}strogenrezeptornegativen Rezidivs assoziiert. Der Verlust der Rezeptorpositivit{\"a}t zeigte einen Trend zu einem geringeren Gesamt{\"u}berleben.},
  subject      = {Adjuvante Therapie},
  language  = {de}
}
@article{LoebLinsmeierHerbertetal.2023,
  author    = {L{\"o}b, Sanja and Linsmeier, Eva and Herbert, Saskia-Laureen and Schlaiß, Tanja and Kiesel, Matthias and Wischhusen, J{\"o}rg and Salmen, Jessica and Kranke, Peter and Quenzer, Anne and Kurz, Florian and Weiss, Claire and Gerhard-Hartmann, Elena and W{\"o}ckel, Achim and Diessner, Joachim},
  title     = {Prognostic effect of HER2 evolution from primary breast cancer to breast cancer metastases},
  series = {Journal of Cancer Research and Clinical Oncology},
  volume    = {149},
  journal   = {Journal of Cancer Research and Clinical Oncology},
  number    = {8},
  doi       = {10.1007/s00432-022-04486-0},
  url       = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-324068},
  pages     = {5417-5428},
  year      = {2023},
  abstract  = {Purpose Therapeutic options for breast cancer (BC) treatment are constantly evolving. The Human Epidermal Growth Factor 2 (HER2)-low BC entity is a new subgroup, representing about 55\% of all BC patients. New antibody-drug conjugates demonstrated promising results for this BC subgroup. Currently, there is limited information about the conversion of HER2 subtypes between primary tumor and recurrent disease. Methods This retrospective study included women with BC at the University Medical Centre Wuerzburg from 1998 to 2021. Data were retrieved from patients' records. HER2 evolution from primary diagnosis to the first relapse and the development of secondary metastases was investigated. Results In the HR-positive subgroup without HER2 overexpression, HER2-low expression in primary BC was 56.7 vs. 14.6\% in the triple-negative subgroup (p < 0.000). In the cohort of the first relapse, HER2-low represented 64.1\% of HR-positive vs. 48.2\% of the triple-negative cohort (p = 0.03). In patients with secondary metastases, HER2-low was 75.6\% vs. 50\% in the triple negative subgroup (p = 0.10). The subgroup of HER2-positive breast cancer patients numerically increased in the course of disease; the HER2-negative overall cohort decreased. A loss of HER2 expression from primary BC to the first relapse correlated with a better OS (p = 0.018). No clinicopathological or therapeutic features could be identified as potential risk factors for HER2 conversion. Conclusion HER2 expression is rising during the progression of BC disease. In view of upcoming therapeutical options, the re-analysis of newly developed metastasis will become increasingly important.},
  language  = {en}
}