[ @entity189 related to exposure to XXXX ].

@entity1 @entity3484 @entity5 @entity17072 @entity189 @entity72746 @entity27839 @entity4478 @entity150 @entity10231 @entity16748
Clinical and statistical observations were made on a group of 438 @entity1 who had worked with @entity17072 ( @entity16748 , @entity27839 , @entity72746 and @entity10231 ) with reference to their carcinogenic properties in the urinary tract. @entity3484 developed in 68 (15.5%), with an average latent period of 22 years and 11 months. In these 68 cases, @entity3484 were found in 16 cases, 8 of which had bilateral lesions. The average age of onset was 48.1 ranging from 24 to 79. The incidence of @entity5 increased with the length of exposure to the @entity4478 . There was no finding that smoking habit increased the incidence of @entity5 in this group. Of the 49 new @entity1 with @entity150 , urine cytology was positive in 24 (49.0%) and suspicious of @entity5 in 10 (20.4%), respectively. This indicated that it could be a useful screening test. Transurethral surgery was most frequently performed as an initial treatment. Recurrence occurred in 50 cases (73.5%), but 5-, 10- and 20-year-survival rates were 89.0 79.3 and 64.7%, respectively, showing a good prognosis. @entity5 in other organs developed in 18 (4.1%) of the 438 workers. The incidence of such @entity5 was significantly higher in the workers who had been exposed to @entity27839 than in others. Our data indicate that close observation is still necessary for early detection of @entity1 with new or recurrent @entity189 in this group.
