--there is an uncommon variant known as acute onset small fiber neuropathy, that is sometimes thought to be a small fiber variant of Guillain Barre, or a Guillian Barre "like" syndrome:

GBS

Pain Differential Diagnosis

Acute small fibre sensory neuropathy: another variant of Guillain-Barre syndrome? -- Seneviratne and Gunasekera 72 (4): 54
-- Journal of Neurology, Neurosurgery & Psychiatry