Growth of school children with polychlorinated biphenyl poisoning or yusho.

In 1968, a mass poisoning due to polychlorinated biphenyls or yusho occurred in Japan. It was reported that poor growth in school children with yusho was observed 1 year after the poisoning. This study was intended to ascertain whether or not the unfavorable effect of the polychlorinated biphenyl poisoning on growth among the school children with yusho is still appreciable. Data from the physical examinations made in 1970 and 1971 were collected and analyzed. The result obtained was that growth in yusho cases was suppressed temporarily and thereafter increments tended to be close to the average value in the control group.