lesions, especially about the periphery of the group or patch, may appear from time to time.
In some instances, more especially about the scalp, the surface of the ulcerations becomes papillary or wart-like, with an offensive, yellowish, puriform secretion (syphilis cutanea papillomatosa).
From what diseases is the tubercular syphiloderm to be differentiated?
From tubercular leprosy, epithelioma and lupus vulgaris, especially the last-named.
What are the chief diagnostic characters of the tubercular syphiloderm?
The tendency to form segments, crescents and circles, the color, the pigmentation and ulceration, the history, and not infrequently marks or scars of former eruptions.
Fig. 59.
Tubercular Syphiloderm.
Describe the gummatous eruption of syphilis.