Among the problems presented in the increasing use of the mass roentgenologic chest survey is the demonstration of certain abnormal upper lobe processes involving the bronchi which may easily be mistaken for significant pulmonary tuberculosis. Symptomatic and disabling bronchiectasis is predominantly a disease of the lower lobes, but in recent years numerous cases, particularly of the subclinical, mild, or dry type, have been found involving the upper lobes exclusively. Mallory (1) has given a clear-cut analysis of the pathogenesis and pathology, especially as regards the symptomatic disease in the lower lung fields. The bronchiectases, however, do not differ with their location or their etiologic background (2). The microscopic character is the same, too, whether the dilatation is cylindrical, saccular, or ampullar. The essential finding is the destruction of the musculo-elastic layer of the bronchial wall, which is due to a non-specific process. Bronchial inflammation plus atelectasis or pneumonitis of non-specific type adequately explain the development of most cases of lower lobe bronchietasis. A great many cases of upper lobe bronchiectasis, on the other hand, represent burnt-out reinfection pulmonary tuberculosis; some follow obstructive lesions of the bronchi after healing of an active primary tuberculosis (3, 4), and a still smaller group is secondary to congenital anomalies of the bronchial tree (5). In one of the cases described below, a variation of the bronchovascular pattern in the right upper lobe was mistaken for active pulmonary tuberculosis in this region. Such interesting anomalies often unaccompanied by disease of the accessory or misplaced bronchial branches have recently been described in a discussion of the surgical approach to the bronchopulmonary segment (6, 7). Although there are no pathological differences between bronchiectasis located in the upper lobes and the disease in the lower lung fields, there are generally recognized clinical differences. Unlike an extensive process of the same sort in the lower lobes, upper lobe bronchiectasis may produce no disabling symptoms during the lifetime of the patient, or the only complaint may be recurrent blood-spitting. Many of these patients expectorate small amounts of mucopurulent sputum, but because of the favorable gravitational location of the disease, the sputum does not accumulate in bronchial pools. Expectoration is free when it is present, it comes in small quantities at a time, with little or no odor, and is not as a rule associated with violent coughing. So undisturbing is the respiratory complaint—sometimes the little sputum in upper lobe bronchiectasis is unconsciously swallowed rather than expectorated—that symptoms referable to the lungs are often elicited only on careful questioning. The nutrition and the general well-being of the patient usually do not suffer. Clubbing of the fingers is unusual.
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