Frequency of misrecognition of pulmonary tbc where it does not exist. K. H. Blumel (Münch., m. W., 1928, No. 29)

On the basis of extensive observations in his sanatorium, the author thinks that this frequency is very high - more than the total number of investigated patients. Inactivated tuberculosis is most often mistaken for active tbc; emphysema, bronchial asthma, bronchiectasis, bronchitis, and intercostal neuralgia are also often mistaken for tbc.