Many references have been made previously to the various types of skin and to the changes in the reaction to mechanical stimulation. A review of these variations, hitherto grouped under the names of "ichthyosis, ichthyoid, xeroderma, etc.," shows that there exists within these larger groups a number of definite types, the recognition of which is essential to rational treatment. The treatment should be based on the reaction results and on the accompanying evidence of endocrine glandular activity.
A suggested list of these varying types is as follows:
Congenital.
A mild xeroderma, without glazing or large scales; no thickening; a mild "branny" desquamation after friction; with or without perspiration; oily secretion diminished.
A true xeroderma, with glazed, dry skin and branny desquamation; no large scales; with or without perspiration; oily secretion diminished.
A true ichthyosis with large, dry, flaking scales; hair is dry, brittle and thin; much desquamation of scalp; perspiration and oily secretion diminished.