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B. T. McMahon, M.D.
JAMA. 1933;100(19):1557. doi:10.1001/jama.1933.02740190083029.
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To the Editor:  —At a recent meeting of the New York State Medical Society tuberculin therapy was advocated, in the Section on Otolaryngology, for tuberculous laryngitis. In the discussion, no reference was made to the great danger that tuberculin is liable to provoke severe and extensive focal reactions. It is well known that pulmonary tuberculosis may be present without giving rise to conscious symptoms, and, in children, unsuspected tuberculous infiltration of the tracheobronchial lymph glands is not uncommon. Injudicious use of tuberculin in such cases might lead to serious consequences. Even in the fields of dermatology and ophthalmology, in which tuberculin has proved its usefulness, this possibility should be kept in mind and tuberculin therapy should not be instituted without previously determining whether there exists in the lungs a type of lesion contraindicating it. Particularly is this true in tuberculous laryngitis, which, for all practical purposes, is secondary to pulmonary


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