Monday, June 4, 2012

what is fibrocaseous tuberculosis


what is fibrocaseous tuberculosis?
I need a definition of the disease
Other - Diseases - 3 Answers
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1 :
It is believed that most cases of post-primary (reactivation) tuberculosis develop in the apical and/or posterior segments of an upper lobe. In the typical case, the initial focus of disease enlarges and erodes into a bronchus, through which the partly liquefied necrotic tissue in the central portion of the lesion is drained, leaving a cavity. It is at this stage that most cases are identified clinically. In patients in whom treatment is not instituted or followed, or in whom the organisms are drug resistant, the disease may progress to involve the entire lobe. Such progression usually occurs over many months or years and is characterized by destruction and fibrosis of increasing amounts of lung parenchyma associated with one or more cavities of various size and variably severe bronchiectasis (the latter as a result of traction on the airway wall by fibrous tissue in the adjacent lung parenchyma). The end result is a markedly shrunken upper lobe. The radiographic appearance is that of an inhomogeneous opacity (ectatic airways and/or tuberculous cavities enveloped by fibrous tissue). The ipsilateral hilum is typically elevated, also as a result of traction by parenchymal fibrosis. Although usually caused by M. tuberculosis, infection by other mycobacterial species, as in this case, may result in the same sequence of events.
2 :
its got something too do with the thyriodd glands,
3 :
I think it was a song in "Mary Poppins



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