Tuberculosis Cutis (Verruca Necrogenica). (After Model in Guy's Museum.)
State the etiology.
Heredity, insufficient and unwholesome food, impure air, and the like are predisposing. The tubercle bacillus is the immediate exciting cause.
The disease usually appears in childhood or early adult life, and not infrequently follows in the wake of some severe systemic disease. Etiologically it is identical in nature with lupus.
How is the tuberculous ulcer to be differentiated from syphilis?
By the peculiar character of the tuberculous ulceration, the absence of outlying tubercles and infiltration, together with its history, course, and often the presence of other tuberculous symptoms.
State the prognosis.
These various types of tuberculosis cutis are, as a rule, more amenable to treatment than that form known as lupus vulgaris (q. v.).
What is the treatment of these forms of tuberculosis cutis?