An informal workshop on ataxia-telangiectasia heterozygotes and cancer was held in Lyon, France, on January 22 to 23, 1985, and was organized jointly by the International Agency for Research on Cancer (IARC) and the International Comission for Protection against Environmental Mutagens and Carcinogens (ICPEMC). The participants were C. F. Arlett (University of Sussex, United Kingdom), A. Aurias (Pavillon Regaud, Paris, France), H. Bartsch (IARC, Lyon, France), B. A. Bridges (University of Sussex, United Kingdom, and Chairman, ICPEMC), N. E. Day (IARC) R. A. Gatti (UCLA School of Medicine, Los Angeles, CA), N. G. J. Jaspers (Erasmus University, Rotterdam, The Netherlands), G. Lenoir (IARC), L. Luzzato (RPMS, Hammersmith Hospital, London, England), R. W. Miller (National Cancer Institute, NIH, Bethesda, MD), R. Montesano (IARC), P. Pani (Instituto di Farmacologia and Patologia Biochimica, Cagliari, Italy), R. Saracci (IARC), A. Schwartz (Fels Research Institute, Philadelphia, PA), D. Scott (Christie Hospital, Manchester, England), Y. Shiloh (The Children's Hospital, Boston, MA), M. H. Skolnick (School of Medicine, Salt Lake City, UT), M. Swift (University of North Carolina, Chapel Hill, NC), L. Tomatis (Director, IARC), and H. Yamasaki (IARC).
There will be no formal publication of the proceedings. The present summary was prepared by B. A. Bridges and represents a personal overview of the meeting; it has been designated Meeting Report No. 1 by ICPEMC.