SPHAŒLODERMA

Synonyms.—Dermatitis gangrænosa; Erythema gangrænosum; Spontaneous
gangrene of the skin.

Sphaceloderma, or dermatitis gangrænosa, is a term applied to various
cases of cutaneous disease in which gangrene is the essential and constant
feature. The predisposing causes are, doubtless, many and diverse.
There is a constitutional factor, such as neurasthenia, hysteria, diabetes,
sepsis, systemic infection, central nervous disease, or the like. In
addition, there is, in all probability, a local microbic element. The
condition is a rather rare one, and the size, behavior, character, extent,
and distribution of the lesions vary somewhat in the different instances.
The propriety of considering the several varieties under separate heads
is, in my judgment, a questionable one, as there is, doubtless, a close
analogy, especially as to the infantile type, adult type, and diabetic type,
the underlying factor being diverse, but the essential local factor probably
identical.

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