In the whole realm of clinical medicine in children, there is probably no field which presents more difficulties than does that of disease in the chest, yet such diseases are not rarities but are brought to our notice daily. The difficulties relate chiefly to chronic, as distinct from acute,disease; for the latter has, in the main, a more violent and patent mode of expression, not only as regards the general symtoms but also as regards the local signs. Chronic infection, on the other hand, or the residue of acute infection, often presents us with the most perplexing problems in diagnosis. The doubt and confusion which often attend the interpretation of signs are dependent not only on the rather imperfect, and as yet inarticulate, methods of physical and radiologic examination, but also on certain other factors. In general terms, these factors are due to the changing expression of the same
DAVIDSON M, PEARSON WJ. CHRONIC LUNG INFECTIONS IN CHILDREN. Am J Dis Child. 1927;33(1):1–26. doi:10.1001/archpedi.1927.04130130008001
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