| erythema dose | The minimum amount of X-rays or other form of radiation sufficient to produce erythema; historically, this dose was indicated by the Sabouraud meter as the B tint, the Holzknecht as 5(5H), the Hampson as 4, and the Kienbock as 10. (05 Mar 2000) |
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| erythema dyschromicum perstans | 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. Synonym: ashy dermatosis. (05 Mar 2000) |
| erythema elevatum diutinum | A chronic symmetrical eruption of flattened nodules, of a pinkish or purplish colour, 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. Synonym: Bury's disease. (05 Mar 2000) |
| erythema exfoliativa | Familial continual skin peeling characterised by a separation of stratum corneum in leaflike flakes occurring everywhere except on the palms and soles; the cause is unknown. Synonym: erythema exfoliativa, erythroderma exfoliativa. (05 Mar 2000) |
| erythema figuratum perstans | A chronic recurring erythematous eruption consisting of small and large annular lesions, with a scant marginal scale, usually of unknown cause. Synonym: erythema figuratum perstans. (05 Mar 2000) |
| erythema fugax | An obsolete term for a diffuse and fleeting erythema from emotional stimuli. (05 Mar 2000) |
| erythema gyratum | Erythema circinatum in which the various ringed lesions overlap each other. (05 Mar 2000) |
| erythema induratum | A type of panniculitis characterised histologically by the presence of granulomas, vasculitis, and necrosis. It is traditionally considered to be the tuberculous counterpart of nodular vasculitis, but is now known to occur without tuberculous precedent. It is seen most commonly in adolescent and menopausal women, is initiated or exacerbated by cold weather, and typically presents as one or more recurrent erythrocyanotic nodules or plaques on the calves. The nodules may progress to form indurations, ulcerations, and scars. (12 Dec 1998) |
| erythema infectiosum | <dermatology> An acute viral infection (human parvovirus) in children that manifests with a fever and a unique facial rash (slapped cheek appearance). After 1-2 days the rash will often spread to the extremities and trunk. The illness is nonserious and self-limiting. Environmental factors such as sunlight, hot baths and emotional factors can cause the rash to recur. Referred to as fifth disease or erythema infectiosum. (27 Sep 1997) |
| erythema intertrigo | See: intertrigo. (05 Mar 2000) |
| erythema iris | Concentric rings of erythema varying in intensity, characteristic of erythema multiforme. Synonym: herpes iris. (05 Mar 2000) |
| erythema keratodes | Keratodermia with an erythematous border. (05 Mar 2000) |
| erythema marginatum | <dermatology> A distinctive migratory and transient pink rash with pale centres, a rare manifestation of rheumatic fever. (27 Sep 1997) |
| erythema migrans | <clinical sign> A benign condition where there is a map-like appearance to the tongue resulting from irregular denuded patches in the surface (loss of tongue papillae). Likely secondary to local irritation from hot or spicy foods, alcohol or tobacco. There are no significant complications. (27 Sep 1997) |
| erythema multiforme | <dermatology> A rash that results from an allergic response, most often secondary to a drug. The rash is described as pink-red macules (flat), that may have clear centres (iris lesions) or appear as a dusky violet colour. Erythema multiforme most often results from reactions to sulpha drugs, penicillin's, phenytoin, barbiturates, phenolphthalein and carbamazepine. In some cases, erythema multiforme can result secondary to a Herpes simplex infection or Mycoplasma infection. (27 Sep 1997) |