Among the phenomena of the developmental period of childhood, there is none more striking perhaps, than the activity for the lymphatic system. The lymph glands constitute an apparatus for filtration. Given the factors of rapid growth, on the one hand, and of poorly developed powers of resistance, on the other, and it can readily be seen that the period of childhood must necessarily be accompanied by marked reactive irritation and inflammation of the entire glandular system. During this period the mucous membranes are prone to irritation, with resulting inflammation. Added to this, there is the disposition, often hereditary, not infrequently aggravated by faulty conditions of development and hygiene, to chronic inflammation of mucous membrane, skin and bone. Under such conditions it is not surprising that the filter system should be taxed to its utmost capacity—hardly less astonishing that we should find very often, in the inability
FRIEDLANDER A. THE DIAGNOSIS OF ENLABGED BBONCHIAL LYMPH NODES.. JAMA. 1905;XLIV(1):19–22. doi:10.1001/jama.1905.92500280016002d
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