A similar study reported that respiratory diseases (16.7%) were mainly responsible for a higher morbidity among exposed tannery workers in Kanpur, India.24 It is possible that workers with respiratory diseases may ultimately develop bronchial obstruction leading to lung cancer, which is quite common among Cr-exposed tannery workers.1,27 It is important to note that no other study, except one previous work with a small sample size, found elevated serum IgE levels in tannery workers and thus cannot be compared with other results.18 This evidence concerns the gene IGHE and lung cancer.