Dyskeratosis is abnormal keratinization occurring prematurely within individual cells or groups of cells below the stratum granulosum.Kumar, Vinay; Fausto, Nelso; Abbas, Abul (2004) Robbins & Cotran Pathologic Basis of Disease (8th ed.). Saunders. Page 1392. .

Dyskeratosis congenita is congenital disease characterized by reticular skin pigmentation, nail degeneration, and leukoplakia on the mucous membranes associated with short telomeres.

See also Skin lesion Skin disease List of skin diseases

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