| An Epidemiologic Study to Screen for Chronic Myelocytic Leukemia in War Victims Exposed to Mustard Gas Mostafa Ghanei1 and Ali Akbar Vosoghi 2 1Chemical Warfare Victims Research Department, Baqiyatallah University of Medical Sciences, Tehran, Iran; 2Chemical Warfare Victims Department, Isfahan University of Medical Sciences, Isfahan, Iran Abstract
Chemical agents such as mustard gas (or sulfur mustard) , which has alkylating characteristics, were used against Iranian combatants in the Iraq-Iran war. Previous studies have not shown a strong link between these chemical agents and the development of chronic myelocytic leukemia (CML) . The purpose of this study was to evaluate the increased risk of CML development in Iranian soldiers exposed to mustard gas during the war. Based on a descriptive study of 2,500 cases with documented exposure to various chemical warfare agents, 665 patients had documented exposure to mustard gas. We screened the latter using the leukocyte alkaline phosphatase (LAP) test and performed further cytochemical studies on cases with positive results. From among the 665 cases with documented exposure to mustard gas, 9 cases had LAP scores < 20 ; 2 of these 9 cases had CML and a score of zero (0.3%) . We detected cytogenetic abnormalities in 7 patients with low LAP scores and atypical lymphocytes of 5-11% in 40 patients. The risk ratio of CML developing in victims exposed to mustard gas (cutaneous or respiratory) may be higher in comparison with the normal population, although confounding factors (e.g., the possibility of exposure to combined chemical agents, excluding patients who did not manifest blisters) limited our results. Because the increased development of CML in young patients with a documented history of exposure to mustard gas cannot be disregarded, further studies are needed. Key words: chronic myelocytic leukemia, Iran, mustard gas, war victims. Environ Health Perspect 110:519-521 (2002) . [Online 3 April 2002] http://ehpnet1.niehs.nih.gov/docs/2002/110p519-521ghanei/ abstract.html Address correspondence to M. Ghanei, Research Department, Baqiyatallah University of Medical Sciences, Vanak Square Mollasadra Avenue, 19945-587 Tehran, Iran. Telephone: 98-218053770. Fax: 98-218040106. E-mail: m.ghanei@bmsu.ac.ir We express our sincere appreciation to J. Goldman for his help in preparation of the manuscript and to H. Abolghasem, A. Saadat, and P. Mahdipour for their help in the hematology and cytogenic studies. Received 23 July 2001 ; accepted 23 November 2001.
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