NEFL and myeloid sarcoma: Many studies have reported the potential value of CSF and peripheral blood to quantify NFL as a biomarker in a variety of diseases characterized by axonal loss, like stroke, small vessel disease, HIV infection, head trauma, amyotrophic lateral sclerosis, Alzheimer’s disease, Huntington’s disease, acute spinal cord injury, neuromyelitis optica, and MS (3, 4).