Prostate cancer presenting as brain metastasis with concurrent elevation of carcinoembryonic antigen and carbohydrate antigen 19-9 levels: illustrative case.

Brain metastases from prostate cancer with elevated CEA and CA19-9 are rare. Although these markers often indicate a poor prognosis, this patient achieved a favorable outcome with multimodal treatment. https://thejns.org/doi/10.3171/CASE25735.