Document oeZrYGNaaBnENdwKN0O9geXEr

69. such cases for the record. There were nine deaths prior to the be* ginning of the time period covered by the study, including one in which the diagnosis was mediastinal lymphosarcoma. All of these nine cases occurred at Thetford Mines. It is somewhat surprising that there is ao record of any lung cancer deaths among the Asbestos group in the interval preceding the beginning of the study and equally so that ao cases have been reported in 19S6 and 1957. During the period covered by this investigation, there were six proved cases and three suspected cases at Thetford Mines, as well as three proved cases at Asbestos. Through 1956 and to dato in 1957, there were eight deaths at Thetford Mines, six of which were merely suspected and included such diagnoses as mediastinal lymphosarcoma, mesothe lioma, cancer of the leg with metastases to lung, absess of lung, and cancer of the pancreas. One other was diagnosed on the basis of x-ray only. In addition, there are now Living four eases in which the diagnostic evidence is strongly suggestive of lung cancer. This is a total of 33 cases of all types, including ten "suspected" but unproved cases, and four that are still living. The remaining 19 constitute the total of proved cases of cancer of the lung in both areas since 1940. Sixteen of these have been at Thetford MLnea and only three at Asbestos, all of which occurred during the period oi the study. The proved caees averaged 59 years of age at death, and varied between 37 years and 68 years. Their working span covered i