Nerve conduction studies have been carried out in chronically exposed industrial workers with raised blood lead concentrations but no clinicalevidenceofneuropathy.9–13 Neurophysi- ology was normal in many, otherwise showing minimally slowed motor conduction with slightly reduced compound muscle action potentials. These slight abnormalities tended to improve once lead exposure ceased. Abnor- malities of sensory nerve action potentials were noted only in a few of these subjects, with slowed conduction rather than reduced ampli- tude.13 Sensory symptoms were generally uncommon in these studies. Criteria for diagnosing lead induced neuropathy have been formulated1: (1) Demonstrable neuropathy on clinical, pathological, or electrophysiological grounds;(2) Involvement of another organ sys- tem;(3) exposure corresponding in time to the progression of the disease; removal from expo- sure should result in stabilisation or remission; (4) an increased tissue or body fluid content of lead.