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primary tuberculosis

n.
  1. Tuberculosis caused by infection with tubercle bacilli and characterized by the formation of a primary complex in the lungs consisting of a small peripheral pulmonary focus and hilar or paratracheal lymph node involvement; it may cavitate and heal with scarring or progress.
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The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.