The Journal of Thoracic and Cardiovascular Surgery, Vol 77, 522-525, Copyright © 1979 by The American Association for Thoracic Surgery and The Western Thoracic Surgical Association
Detection, localization, and treatment of occult bronchogenic carcinoma in nickel workers
JM Nelems, JD McEwan, DW Thompson, GR Walker and FG Pearson
Asymptomatic men exposed to nickel sulfide prior to 1963 were studied
prospectively to investigate cytologic abnormalities in the sputum. We
discovered a considerably greater incidence of squamous cell tumors that
would have been expected from subjects exposed only to cigarette smoke.