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Flat : Patch

A flat, generally greater than 0.5-cm area of skin or mucous membrane with a color different from that of surrounding tissue. Patches (also called large macules) may have non-palpable fine scale.

Round hyperpigmented patch in fixed drug eruption

Round hyperpigmented patch in fixed drug eruption

Irregular pigmented patch of melasma

Irregular pigmented patch of melasma

Coalescing hypopigmented patches of tinea versicolor

Coalescing hypopigmented patches of tinea versicolor

Sharply demarcated hypopigmented patch of vitiligo

Sharply demarcated hypopigmented patch of vitiligo