Abstract
During the past fifteen years widespread interest in the relationship of bronchiectasis to infection of the paranasal sinuses has been shown by the numerous articles which have appeared in the medical literature, especially in journals devoted to otolaryngology. This interest has been increased by the stimulating advances made in the fields of bronchoscopy, roentgenology and thoracic surgery and particularly by the increased knowledge of the reaction of the mucous membranes of the respiratory tract to allergy and to infection. The knowledge, however, of some of the phases of this relationship is still obscure. A brief résumé of the literature will help to summarize the present views on the subject. CAUSAL RELATIONSHIP As early as 1914 Thomson1 suggested that persistent bronchorrhea might be due to chronic suppuration of the sinuses. Later Sergent,2 Rist,3 Webb and Gilbert4 and others, noting the presence of sinusitis in patients with

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