In a 27-year old male with acute thallium poisoning, signs of initiall
y severe sensorimotor neuropathy with complete remission after two wee
ks were demonstrated. Signs of cardiovascular autonomic neuropathy wer
e initially absent, but developed after a latency period of one week w
ith marked improvement after seven months. Delayed autonomic neuropath
y may be caused by a late affection of small unmyelinated autonomic ne
rve fibers. (C) 1998 Intox Press, Inc.