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Prosecutors Probe Bremen Breast Cancer Misdiagnoses That Led to Unnecessary Treatment for 34 Patients

A misread tumor marker drove the errors, prompting a review of roughly 500 reports and the introduction of mandatory double-reading.

Overview

  • Gesundheit Nord confirmed 34 women were overtreated after pathology at Klinikum Bremen‑Mitte misclassified tumors between October 2024 and November 2025.
  • The patients received antibody therapy and, in some cases, chemotherapy that the clinic now says was not indicated, with reports of severe side effects and possible long‑term harms.
  • Bremen prosecutors opened investigations on suspicion of negligent bodily harm in 34 cases, with inquiries initially not directed at a named individual.
  • The pathologist was removed from the task in Bremen; Universitätsmedizin Göttingen reviewed her work there, reported no irregularities, and temporarily relieved her of duties pending quality review.
  • Political leaders called for full transparency, independent checks, and stronger quality assurance, while affected hospitals instituted a four‑eyes principle for sensitive findings.