Abstract
Miliary tuberculosis, erysipelas, and tuberculous adenitis have lesion-patterns characteristic of diseases spread by blood and lymph vessels. These three diseases represent three types of spread. In miliary tuberculosis, the arterial blood stream distributes multiple foci at random. In erysipelas, organisms invade a plexus of lymph vessels and multiply. As a result the primary lesion enlarges, colony-like, from its margins. In tuberculous adenitis, the organisms spread in lymph vessels to multiply in the regional lymph nodes and lymph node chains. Modifications of the typical patterns are common. For example primary lesions in the left side of the heart, or in the
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