The diffuse enhancing leptomeningeal enhancement in young men leads to the diagnosis of meningitis or meningeal carcinomatosis. However, the latter seems less likely due to the patient's age.
The lumbar puncture was obtained. The results showed a slightly elevated protein level (1.1 g/L), normal glucose level, no RBCs, and a minimal number of white blood cells in the cerebrospinal fluid. Mycobacterium tuberculosis PCR in the CSF and CSF cultures are both negative.