OnCo
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Platinum chemotherapy in HRD tumours

DNA-crosslinking chemotherapy is especially effective in tumours that cannot repair double-strand breaks.

Carboplatin raises pCR in TNBC (GeparSixto, BrighTNess) with greater benefit in BRCA/HRD; platinum sensitivity defines the treatable ovarian cancer population.

Rationale
Interstrand crosslinks need homologous recombination to repair; HRD cells accumulate lethal double-strand breaks.
Evidence
Multiple randomised trials.

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