Primary Intramedullary Spinal Cord Lymphoma Presenting as a Longitudinal Extensive Transverse Myelitis Diagnosed via Brain Biopsy: A Case Report. - Sakiyama, Hiroshi; Kozu, Yasuhito; Yokota, Chisato; Umegaki, Masao; Maeda, Tetsuo; Nakano, Misa (Case Reports in Neurology, 2026)