Melanoma after Exposure to PCB's

To the Editor: We wish to report a possible new carcinogenic hazard. Arochlor 1254, one of the polychlorinated biphenyls (PCB's), was used by a petrochemical plant in the Northeast in certain processes during a nine-year period ending in the late 1950's. A preliminary analysis of the incidence of malignant neoplasms among workers who handled this compound, based upon information provided by the medical director of the plant, has been made (this preliminary report would not have been possible without the prompt attention to this potential problem and the research co-operation given by the company). Of a total of 31. No extract is available for articles shorter than 400 words.