In a study of the lobar distribution of tumors in 250 consecutive cases of primary bronchial cancer, it was noted that 130 of the tumors originated in the upper lobes, 11 in the right middle lobe, and 49 in the lower lobes. Some 40 arose in the main bronchi, and most of the remainder were either “hilar” or unspecified in anatomic location.There was no apparent correlation of the lobar site of these tumors with the lobar location of childhood pneumonic lesions as observed in another group of patients in the same hospital.
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