Kaposi has described a gangrene of the skin noticed by him in hysterical and anemic young women. This condition may be an imposture or possibly due to some central nerve lesion. It occurs first as a raised, reddened spot, varying in size from a quarter to a silver dollar and accompanied by burning sensations. In a few hours, the skin becomes bluish-black or greenish brown in color and a leathery eschar is formed, like that produced by sulphuric acid. A hypertrophic scar may follow.
Prognosis and Treatment. The process is recurrent, and may continue for months or years before stopping. Constitutional treatment, often including mental suggestion, is essential. I have seen cases improved or cured by Arsenic, Hyoscyamus, Ignatia and Kreosote.