organotypic cultures that allows to evaluate inhibitors against metastases growing in situ. By
applying this approach to the unmet clinical need of brain metastasis, we identified several
vulnerabilities. Among them, a blood–brain barrier permeable HSP90 inhibitor showed high
potency against mouse and human brain metastases at clinically relevant stages of the
disease, including a novel model of local relapse after neurosurgery. Furthermore, in situ …