The bullous syphiloderm, (of acquired syphilis) is a rare and usually late eruption, appearing in the form of discrete, disseminated, rounded or ovalish, pea- to walnut-sized, partially or fully distended, blebs. The serous contents soon become cloudy and puriform. In some cases the lesions are distinctly pustular from the beginning. The crust, which soon forms, is of a yellowish-brown or dark green color, and may be thick and stratified (rupia), as in the deep variety of the large flat-pustular syphiloderm. The erosions or ulcers beneath the crusts secrete a greenish-yellow fluid. It is a malignant type of eruption, and is usually seen in broken-down subjects.
It is not an uncommon manifestation of hereditary syphilis (q. v.) in the newborn.
Fig. 57.
Tubercular Syphiloderm.
How is the bullous syphiloderm to be differentiated from other pemphigoid eruptions?
By the gravity of the disease, the accompanying ulceration, the course and history; and by other evidences, past or present, of syphilis.
Describe the tubercular eruption of syphilis.
The tubercular syphiloderm (syphiloderma tuberculosum) may exceptionally occur within the first year as a more or less generalized eruption. As a rule, however, it is a late manifestation, at times appearing many years after the initial lesion; is limited in extent, and shows a decided tendency to occur in groups, often forming segments of circles and circular areas, clearing in the centre and spreading peripherally.
It consists (as a late, limited manifestation) of several or more firm, circumscribed, deeply-seated, smooth, glistening or slightly scaly elevations; rounded or acuminated in shape, of a yellowish-red, brownish-red or coppery color and usually of the size of small or large peas. Several groups may coalesce, and a serpiginous tract result (serpiginous tubercular syphiloderm). The lesions develop slowly, and are sluggish in their course, remaining, at times, for weeks or months, with but little change. As a rule, however, they terminate sooner or later, either by absorption, leaving a more or less permanent pigment stain with or without slight atrophy (non-ulcerating tubercular syphiloderm), or by ulceration (ulcerating tubercular syphiloderm).