--that ganglionopathies are typically not length-dependent, as the attack, often autoimmune, is to the cell bodies in the dorsal rot ganglia, which causes the entire cell to be affected (ganglia consist of cell bodies), not just the axon.

Ganglionopathies, or neuronopathies, are typical in neuropathy secondary to Sjogren's syndrome and in some paraneoplastic syndromes, though many are idiopathic.

See:

http://neuromuscular.wustl.edu/antibody/sneuron.html