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and, in some cases, mucoid impaction. The exact cause of bronchial atresia is unknown; the lobar bronchi, subsegmental bronchi, and distal bronchioles develop in the fifth, sixth, and sixteenth weeks of fetal development, respectively. Bronchial atresia is frequently discovered incidentally because it is asymptomatic. Recurrent pulmonary infections are among the most frequent clinical manifestations in symptomatic patients. Because such benign disease

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