JAMA. 1927;89(19):1573-1575. doi:10.1001/jama.1927.02690190011003.
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Our purpose in this paper is to present a series of lesions of pulmonary tuberculosis which differ from the lesions of fibroid apical tuberculosis. These lesions are not fibroid; they very often do not start in the apexes and they do not show the classic fans on a roentgen-ray plate.

Basal tuberculosis is the term under which we have grouped these lesions because it expresses the greatest contrast to apical tuberculosis and because many of these lesions are first found at a base. "Basal tuberculosis" has crept into the literature without any clear pathologic definition. It indicates a pulmonary tuberculous lesion which involves a base before either apex is involved. Fibroid apical tuberculosis differs from basal tuberculosis not only by its location but also by the clinical course and the pathologic anatomy.

This report must be considered as a preliminary study. It is not finished. We have only gross pathologic


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