Skin diseases : including their definition, symptoms, diagnosis, prognosis, morbid anatomy and treatment : a manual for students and practitioners / by Malcolm Morris.

Date:
1879
Catalogue details

Licence: Public Domain Mark

Credit: Skin diseases : including their definition, symptoms, diagnosis, prognosis, morbid anatomy and treatment : a manual for students and practitioners / by Malcolm Morris. Source: Wellcome Collection.

Provider: This material has been provided by the Royal College of Physicians of Edinburgh. The original may be consulted at the Royal College of Physicians of Edinburgh.

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    tliirty grains of the acid to one ounce of vaseline or lard. Chrysophanic acid is the active principle of Goa powder, the Indian remedy for ringworm, and was first recommended in psoriasis by Mi-. Balmanno Squii-e. The chief objection to this drug is the amount of irritation it produces, not so much in the patch to which it has been applied, but in the neighbouring skin. Sometimes this irritation is very severe, when the use of the remedy should be immediately suspended. Pityriasis. Definition.—Pityriasis is a chronic squamous disease of the skin, in which the scales are branny and are seated on a non- infiltrated surface. Symptoms.—The eruption consists of the production of a quantity of fine scales, which are continually being shed and reproduced. The sldn of the afiected part may be slightly red, but there is no efiusion into or thickening of the epidermic layer. There is but slight itching of the part, and, unless the skin be delicate, excoriations rarely result from scratching. Any portion of the body may be afiected with pityriasis, but the most common sites are the hairy parts, more particularly the scalp. The ordinary condition, known as pityi-iasis capitis, has been shown by Hebra to be due to an increased secre- tion of the sebaceous glands, and is in no sense of the word a pityriasis. Z)ia(/7iosis.—Pityriasis maybe confoxinded with— 1. Psoriasis see (p. 149). 2. Tinea tonsurans. The only certain mode of diagnosis is by the use of the microscope, which shows the characteristic fungus elements in tinea; in addition, to the naked eye the hair is seen to be broken off short, and is easily extracted. Pro^^nosis.—Pityriasis is a chronic and often intractable disease, but is never attended with any serious result.