Intoxications due to organophosphate insecticides are common in our country, 
since agriculture has an important place. Besides the well known acute 
cholinergic toxicity, these compounds may cause late-onset distal polyneuropathy 
occurring two to three weeks after the acute exposure. An eight-year-old boy and 
a 13-year-old girl admitted to the hospital with gait disturbances. Beginning 15 
and 20 days, respectively, after organophosphate ingestion. Neurologic 
examination revealed bilateral dropped foot, absent Achilles tendon reflexes and 
peripheral sensory loss. Electromyography demonstrated motor weighed 
sensory-motor polyneuropathy with axonal degeneration significant in the distal 
parts of bilateral lower extremities. Biochemical, radiological findings and 
magnetic resonance imagings were normal. The two cases were taken under a 
physiotherapy program. The two cases are presented here since organophosphate 
poisonings are common in our country, and since late-onset polyneuropathy is not 
a well known clinical presentation as acute toxicity.