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Brain changes in parathion poisoning: observations in 42 cases


, : Brain changes in parathion poisoning: observations in 42 cases. Zeitschrift für Rechtsmedizin. Journal of Legal Medicine 90(3): 173-189

A total of 42 cases were examined neuropathologically to determine possible toxic changes occurring in the brain after parathion intoxication. Sporadic anoxic alterations were observed in 7% of 41 cases in which the cause of death was acute intoxication. Nearly all cases (93%), however, showed marked hyperemia, often coupled with small reactionsless, periventricular hemorrhages which occurred in 40% of the cases. In one third of the cases (33%) there was moderate swelling of the oligodendroglia. Whereas histological evidence of edema was found in nearly one third of the cases (30%), comparison of the brain weights in these subjects with those of a large comparative collective showed definite pathologic brain weights in only five cases (12%) with 95% confidence limits. It is true that in 18 cases (42%) the brain weight was above the normal value if the confidence limit is ignored. Pronounced anoxic alterations were observed in only one case in which the individual survived the acute intoxication for 4 weeks after initial respiratory arrest. Predominantly toxic changes, however, could not be detected in any of the cases examined. This negative morphologic finding does not agree with the physiologic alterations reported by other investigators using animal models; they considered the cause of death in cases of parathion intoxication to be the result of toxic paralysis of the respiratory center. The literature was discussed.

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PMID: 6624274


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