Hypertrophic diseases

Hypertrophic diseases, comprising : -
  1. Diseases of the epithelial layer of the skin, including callosities, corns, and horns, in which the epithelial tissue is specially affected.
  2. Diseases involving the dermic portion, in which the true skin is affected with or without the epithelium.  In some cases the papillary layer is chiefly affected, but in connection with augmented production of, the epithelium also, as in ichthyosis and xeroderma. In other cases the fibrocellu lar tissue of the corium proper is the special seat of change, as in the diseases termed scleroderma, keloid, fibroma, Elephantiasis Arabum, and dermatolysis.
  3. Diseases seated in the vascular structures, including such growths as vascular naevi.