Abstract: ObjectiveTo study the rare causes of GuillainBarré syndrome(GBS). MethodsA total of 9 rare cases of GBS were retrospectively analyzed. ResultsAll 9 cases ranged from 16 to 80 years old， included 8 males and 1 female， the causes of GBS were 1 case of eye trauma，1 case of hepatitis E virus infection，1 case of epidemic hemorrhagic fever， 2 cases of lumbar surgery， 2 cases of head trauma and 2 cases of diabetic ketoacidosis. ConclusionGBS was triggered by trauma， hepatitis E virus infection， epidemic hemorrhagic fever， diabetic ketoacidosis， and surgery after 5 to 14 days prior to symptom onset， the illness reached its peak after onset of 10 to 21 days. The prognosis was relatively good if given treatment of immunglobulin in the early stage of disease， but the pathogenesis of rare causes of GBS was unclear.

Key words: GuillainBarré, syndrome, infection, diabetic ketoacidosis, tranma, surgical procedures operative