In a patient with brain metastasis confined to the cerebellum, would it be reasonable to treat the posterior fossa only (vs WBRT)?

If the patient has favorable prognostic factors and would like to avoid memory loss associated with WBRT, I would first consider whether the patient is eligible for stereotactic radiosurgery. If not a candidate for stereotactic radiosurgery, I would consider enrollment on eligible hippocampal avoidance whole brain radiotherapy trials. If not a candidate I would consider whole brain radiotherapy. My concern would be the need to reirradiate the supratentorium in the future and risk of radiation ov...