Selected monographs on dermatology / P.G. Unna [and others].

Date:
1893
Catalogue details

Licence: Public Domain Mark

Credit: Selected monographs on dermatology / P.G. Unna [and others]. Source: Wellcome Collection.

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    had a very extensive eruption. Thus psoriasis, as a rule, shows no tendency to get materially worse even in untreated cases. On the other hand, in patients suffering from alco- holism and chronic rheumatism it is generally aggravated, and conversely intercurrent affections accompanied by pro- found disturbance of nutrition may be beneficial to, or even cure the disease (v. infra). II. Etiology of Psoriasis. Sex.—Out of 520 patients suffering from psoriasis, 314 were males, 206 females—6o-4 per cent, and 30/6 per cent, respectively. From a compilation of various statistics, out of a total of 2439 patients, 1482 were males and 957 females—6o'8 per cent, of males and 39*2 per cent, of females, a proportion of 3 to 2. ^Age.—Psoriasis is stated to have begun in 548 cases (325 males, 223 females) — Before 15 years . . . 241 times. Between 15 and 20 years . . 86 „ „ 20 „ 30 „ . 123 „ „ 3° » 40 » • 59 » „ 4° „ 50 » • 24 „ „ 5° » 60 >, • • 11 » „ 60 „ 70 „ . . 4 „ Thus psoriasis began 241 times in childhood (under 15 years), i. e. 44 per cent., and only in 2^7 per cent, during the fiftieth year and upwards. Its appearance in the first five years of life was rare; one case only occurred in the second year: its frequency culminated between the fifth and fifteen year. It then diminished up to the twentieth year, and kept on decreasing materially during the succeed- ing decennia, exceeding the synchronous decrease in vital statistics. The percentage was—
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