ALB and Guillain-Barre syndrome: Positive antiganglioside antibodies are considered a useful but not required aid in the diagnosis of axonal forms of GBS because they interfere with the albumin-cytological dissociation of CSF, which is also dependent on the time being requested (1, 9); this may explain the negative results in cases 1, 2, 5, and 6 (milder cases in which antiganglioside antibodies were requested at a later stage); and the positivity in cases 3 and 4 (severe cases, in which antiganglioside antibodies were requested earlier).