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erythema (er-i-the´ma)

Redness of the skin due to capillary dilatation. [G. erythema, flush]
e. ab ig´ne e. caloricum
acrodynic e. acrodynia (2)
e. annula´re rounded or ringed lesions.
e. annula´re centrif´ugum a chronic recurring erythematous eruption consisting of small and large annular lesions, with a scant marginal scale, usually of unknown cause.e. figuratum perstans;
e. annula´re rheumat´icum a variant of e. multiforme associated with rheumatic fever.
e. arthrit´icum epidem´icum Haverhill fever
e. bullo´sum e. multiforme with formation of large vesicles or bullae.
e. calor´icum a reticulated, pigmented, macular eruption that occurs, mostly on the shins, of bakers, stokers, and others exposed to radiant heat.e. ab igne, toasted shins;
e. chron´icum mi´grans a raised erythematous ring with advancing indurated borders and central clearing, radiating from the site of a tick bite such as that by Ixodes dammini; the characteristic skin lesion of Lyme disease, due to the spirochete Borrelia burgdorferi.
e. circina´tum e. multiforme in which the lesions are grouped in more or less circular fashion.
cold e. rash characterized by redness and itching, brought on by exposure to cold.
e. dyschro´micum per´stans variously sized gray or red, slightly elevated macular lesions that tend to coalesce on the trunk, extremities, and face, commonly in dark-skinned Latin Americans; of unknown cause.ashy dermatosis;
e. eleva´tum diu´tinum a chronic symmetrical eruption of flattened nodules, of a pinkish or purplish color, occurring in plaques on the buttocks and extensors of wrists, elbows, and knees, becoming fibrotic and finally scarring; early lesions show necrotizing vasculitis with fibrinoid or lipid deposits in vessel walls.Bury's disease;
e. exfoliati´va keratolysis exfoliativa
e. figura´tum per´stans e. annulare centrifugum
e. fu´gax obsolete term for a diffuse and fleeting e. from emotional stimuli.
e. gyra´tum e. circinatum in which the various ringed lesions overlap each other.
hemorrhagic exudative e. Henoch-Schönlein purpura
e. indura´tum recurrent hard subcutaneous nodules that frequently break down and form necrotic ulcers, usually on the calves and less frequently on the thighs or arms of middle-aged women; they are associated with erythrocyanotic changes in cold weather; although microscopically granulomatous and necrotizing, the lesions are sterile; probably a form of nodular vasculitis.Bazin's disease, nodular tuberculid;
e. infectio´sum a mild infectious exanthema of childhood characterized by an erythematous maculopapular eruption, resulting in a lace-like facial rash or "slapped cheek" appearance. Fever and arthritis may also accompany infection; caused by Parvovirus B 19.fifth disease, Sticker's disease;
e. intertri´go See intertrigo.
e. i´ris concentric rings of e. varying in intensity, characteristic of e. multiforme.herpes iris (1);
Jacquet's e. diaper dermatitis
e. kerato´des keratodermia with an erythematous border.
macular e. roseola
e. margina´tum a variant of e. multiforme seen in rheumatic fever; occasionally has a configuration to suggest the designation e. migrans (geographic tongue).
e. mi´grans , e. mi´grans ling´uae geographic tongue
Milian's e. ninth-day e
e. multifor´me an acute eruption of macules, papules, or subdermal vesicles presenting a multiform appearance, the characteristic lesion being the target or iris lesion over the dorsal aspect of the hands and forearms; its origin may be allergic, seasonal, or from drug sensitivity, and the eruption, although usually self-limited (e.g., multiforme minor), may be recurrent or may run a severe course, sometimes with fatal termination (e.g., multiforme major or Stevens-Johnson syndrome).e. polymorphe, Hebra's disease (1), herpes iris (2);
e. multifor´me bullo´sum Stevens-Johnson syndrome
e. multifor´me exudati´vum Stevens-Johnson syndrome
e. multifor´me ma´jor Stevens-Johnson syndrome
necrolytic migratory e. an erythematous, scaling, and sometimes bullous and erosive dermatitis occurring irregularly in plaques chiefly on the lower trunk, buttocks, perineum, and thighs; associated with weight loss, anemia, stomatitis, and elevation of plasma glucagon in islet cell tumor (glucagonoma) of the pancreas. See also glucagonoma syndrome.
e. neonato´rum e. toxicum neonatorum
ninth-day e. obsolete term for a nontoxic eruption that simulates measles or a toxic erythema, occurring usually on the ninth day of a course of medication; first described as a reaction to arsenical treatment of syphilis.Milian's disease, Milian's e;
e. nodo´sum a panniculitis marked by the sudden formation of painful nodes on the extensor surfaces of the lower extremities, with lesions that are self-limiting but tend to recur; associated with arthralgia and fever; may be the result of drug sensitivity or associated with sarcoidosis and various infections. Deep biopsies show a septal panniculitis with infiltration by lymphocytes and scattered multinucleated giant cells.nodal fever;
e. nodo´sum lepro´sum an acute type of lepromatous reaction with generalized systemic involvement and tender deep cutaneous and subcutaneous nodules of the face, thighs, and arms; usually seen in undiagnosed, untreated, or neglected cases of leprosy.
e. nodo´sum mi´grans subacute migratory panniculitis
e. palma´re heredita´rium [MIM*133000] a condition characterized by asymptomatic symmetrical palmar e.; autosomal dominant inheritance.Lane's disease;
e. papula´tum the papular form of e. multiforme.
e. paratrim´ma e. due to stasis over pressure points.
e. per´nio chilblain
e. per´stans probably a chronic form of e. multiforme in which the relapses recur so persistently that the eruption is almost permanent.
e. polymor´phe e. multiforme
scarlatiniform e. , e. scarlatinoi´des an erythematous macular eruption accompanied by slight constitutional symptoms and followed by desquamation.
e. sim´plex blushing or redness of the skin caused by a toxic reaction or a neurovascular phenomenon.dermatitis simplex;
e. sola´re sunburn
symptomatic e. a general term applied to various e.'s associated with systemic disease, fevers, allergic states, etc.
e. tox´icum flushing of the skin due to allergic reaction to some toxic substance.
e. tox´icum neonato´rum a common transient idiopathic eruption of erythema, small papules, and occasionally pustules filled with eosinophilic leukocytes overlying hair follicles of the newborn.e. neonatorum;
e. tubercula´tum e. multiforme in which the papules are of large size.


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