Abstract
95 benzene workers were clinicalcy examined 4 times during 2 years. The following results were obtained.
1) A single pathological symptom is frequently appeared in slight benzene poisoning.
2) Benzene poisoning makes frequent appearance in benzene workers and few individual difference was observed.
3) Leucopenia and coproporphyrinuria are appeared in the early stage and anemia is appeared in the late stage in the benzene poisoning.
4) The pathological cases in each clinical examination frequently have complicated symptoms.
