Abstract
1. 1. The unrecognized existence of the tuberculoid lesion has been a source of confusion for many years in the prognosis and treatment of the disease. 2. 2. The incidence seems to be high in those races which have been associated with leprosy for a long time. In children the incidence is relatively low. 3. 3. Tuberculoid leprosy is a stage in the natural evolution of immunity in the disease. It represents the peak of local response. 4. 4. Acute reaction in tuberculoid leprosy is still a local phenomenon. This is in contrast with the position in cutaneous leprosy where there is a systemic component as well. 5. 5. Continued study of the evolution and course of the tuberculoid lesion will, it is felt certain, provide a key to the very difficult problem of immunity in leprosy and, for that matter, in many varieties of proliferative disease. 6. 6. A more scientific classification will correlate the clinical appearances with the types of exudate present in the underlying lesions.
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