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Erythema annulare centrifugum (EAC), is a descriptive term for a class of skin lesion [2] presenting redness in a ring form (anulare) that spreads from a center (centrifugum). It was first described by Darier in 1916.
Acute generalized exanthematous pustulosis (AGEP; also known as pustular drug eruption and toxic pustuloderma) is a rare skin reaction that in 90% of cases is related to medication.
Annular erythema of infancy (AEI) consists of self-limited eruptions of erythematous, annular to polycyclic patches and plaques. It is an idiopathic figurate erythema. [1] Over several days, a single lesion disappears without leaving behind any scale or hyperpigmentation. Mostly affecting the trunk, face, and extremities, this rash has no symptoms.
Erythema annulare centrifugum Superficial types: [18] Mild spongiosis, parakeratosis and microvesiculation. "Coat-sleeve anomaly": tight lymphohistiocytic infiltrate surrounding superficial vessels; Deep lesions: Sharply demarcated perivascular mononuclear cell infiltrate in middle to deep dermis [18] Not otherwise specified [notes 2]
Figurate erythema is a form of erythema (reddening of the skin) that presents in a ring or an arc shape. An example is erythema marginatum. [1] Classical types include: [2] Erythema annulare centrifugum; Erythema marginatum rheumaticum; Erythema chronicum migrans; Erythema gyratum repens
Serpiginous rash in cutaneous larvae migrans. Serpiginous, first known to be used in the 15th century, is a term from Latin serpere (“to creep”), usually referring to a creeping, snakelike or slowly progressive skin disease.
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Dermatographic urticaria is sometimes called "skin writing", as it is possible to mark deliberate patterns onto the skin. The condition manifests as an allergic-like reaction, causing a warm red wheal to appear on the skin.