Document Bw16w3vKBRGxmJY19my4qV2o

.4. it. .1. .tm tarts at IXl'i STKI.lt. Ht:.ii.Tii ifPAV C. t. Hull coiii-hulcd iIlcI lung i.iunr was .1 >|kcilic" industrial lia/nrd of certain aslicMns worker* ami that. after 2t) year* uf ex|io- IllUe 1.1 liver ill Ollier form*-- / (,itiiiinn<.nnu>. Ijealli cert; sis was f1.7ft. and in 1<W cases which ijove beet: prowl mu to liave any tyi>e of pneumo |ii enhance sune. the risk is 10 times as jcrenl as for coniosis it was 8.3ft. Gloyne ronsiitero] 'hat the ir the general imputation. "die mortality of the adieslos workers" u, ,gcs of th< This artirle is ini|mri;mi for several rea sons, in addition In the definite eoiielusious at wliieli it arrive,-. I*W example, it In-gins by stating dint "in view of the infrequency of asbestosis. this large nunilier of eases Ik- "disturbing." lurst of all, it is ubvknix dial die |Kqier lines not dial ividi die "morlality of asfiestos workers." and secondly, it must be imrtio in mind tlvit all of Ui. I iloyne's cases were submitted to him for The dang rate found the geuer: age. occup iiich as Sr. (61 cases of lung cancer) suggests--but study Unnisv the findings were unusual i I .yiteh.*" does not prove- -dm lung cancer is an for uncomplicated pneumoconiosis.' It aa jihe first e: ocrujiatioiial hazanl of asbestos workro." reasonably be assumed that cases, including jrarcinoma Neither this article nr any previous <mc which We have examined pr.esenis any figurvs to prove (hat asfiestosis is an infre quent occurrence, Kstinntvs of the numlicr of persons imteniiafly cx|msv<t to asbestos those of nsbesiosls. hi which the Bulling, wen- not considered unusual were not sent to Ur. (iloyne for examination. As a mat ler of fact, in the Kune jmrngrapli in Whirl; he expresses concent over the incidence autopsies 0 ('acroring | 'demonstra .sings." T.: fxfentic.nl w dust in tfie fnited Slates alone vary from 10,000 to 35.000, and the incidence of nsbestosis of any degree might lie higher than Dud imagines. This study, like so many uthers, involves rale in asliestnsis. Dr. Idnyne himself Uiutsclr. |points olll dun the rale for lung cancel i-nciitcnce < based on necropsies at the [bullion Chest 'snail for > I fospilal was 21.3ft- while the figures of jcalculation.' .the Kegistrar-General shoiverl only 2.4ft. have used : He thus recognized that autopsies on a ttr- jtor an tis-r autopsy reconls. The number of |x-nons tain selected group of cases were not rq>- `irith ashes: involvetl in the statistical analysis is only resentative of the general imputation. h Klotz" ir 113, representing only 1,042.25 man-years woukl seem. then, that notwithstanding the .uses of lu of life. It is also true tlvit in selecting men value of Ur. (iloym-'s work, its iuqmnaiirc dimes as I: wlio had Wen employed for at least 20 as an index *f the prevalence 01 lung can. 'idustiwii. years, tin- study autonialieally excluded eer in asliestodes lias lieeu misinterpreted those who died (mm other causes after - by some who have quoted him. All that it shorter employment. really shows is the fact that in a group of | Behrens, jmated that. Ifilcralnre. - Another reason why this puhlication is of importance is a statement which it cuntains to. the ctfeet that `-'the strongest evi dence that it (lung cancer) may lie a hazard 121 rose*. selected (nr speeiat sturly pfj. ithc_ lung--t manly liecauSe they seemed abnormal bv jfhis is an preliminary examinatiiHi. 17. nr 14.1ft, haii incidence 0 lung cancer. trhich were (in asbestos workers) has been produced Mcrcwclher75 in 1947. in the report of cause some by Merewethcr and by Gloynv." the Chief liisjiector of l-actorics, reviewed possibly- hi In 1951 Gluyne<l presented a review all cases rejmrteil between 1924 and 1946 lases were of 1205 autopsies on persons who had in which asliestosis was the cause of- death iplies to the worked tn various dusty oceuilions. This nr a ctiexisting condition. This work was (appears to number included 132 asbestos workers, of taler rMciuled to include nil siieti cases re- [autopsies or, whom 121 showed "pneumoconiosis'*--pre- |nirted up to IKvemlier, l'l54. by which time (arhieh 6 eas. sumafify asfiestosis. Primary cancer of die lung occurred 17 times in (his group. an incidence Rite of 14.1ft, for lung cancer among asbostnsis cases coming to autopsy. There were in his series 796 cases with sili cosis, and 6.9ft of these also showed pri mary cancer of die lung. The incidence of there were 344 deaths, including 205 malts jiormation 1": and 139 females. Among them were 55 aot justify cases 1.16ft) of cancer of the lung, 41 in (mortality r,v, ntnfcs and 14 in females, ft is quite possible Perhaps 1 licit a large iuiuiIkt of a-tn.-lt(livho til,] (.ively on d not die of their aslvslosis, or in whose fin 1955 ho 636 /"id. Ir. June. I9`. ]ntun--7"nun 1