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Microscopic terminologies used in dermatology

Hyperkeratosis

Thickening of the stratum corneum, often associated with a qualitative abnormality of the keratin.
Parakeratosis

Modes of keratinization characterized by the retention of the nuclei in the stratum corneum. On mucous membranes, parakeratosis is normal.

Hypergranulosis

Hyperplasia of the stratum granulosum, often due to intense rubbing.

Acanthosis

Diffuse epidermal hyperplasia.

Papillomatosis

Surface elevation caused by hyperplasia and enlargement of contiguous dermal papillae.

Dyskeratosis

Abnormal keratinization occurring prematurely within individual cells or groups of cells below the stratum granulosum.

Acantholysis

Loss of intercellular connections resulting in loss of cohesion between keratinocytes.