Histopathologic features of large plaque parapsoriasis

(A) The epidermis appears flattened and shows hydropic degeneration of basal cells.

(B) The upper dermis contains a band-like infiltrate, which in places extends into the epidermis.

Reproduced with permission from: Nazarian RM, Duncan LM. Connective tissue diseases (syn. collagen vascular disease). In: Lever's Dermatopathology: Histopathology of the Skin, 12th ed, Elder DE (Ed), Lippincott Williams & Wilkins 2022. Copyright © 2022 Wolters Kluwer Health, Inc.

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Histopathologic features of large plaque parapsoriasis