This document summarizes a case presentation of a patient with progressive neurological deficits and HIV. Over several weeks, the patient developed numbness that spread across his face and limbs, as well as other neurological symptoms. Imaging and spinal fluid testing did not reveal any abnormalities. A biopsy showed diffuse large B-cell lymphoma that was HHV8-positive but EBV-negative. This type of lymphoma is associated with Kaposi's sarcoma-associated herpesvirus (KSHV), which can cause various malignancies in HIV/AIDS patients such as multicentric Castleman's disease, primary effusion lymphoma, and diffuse large B-cell lymphoma.