Erithema is characterized by a change in skin color due to the dilation of blood vessels
- Pink to violaceous depending upon involvement of arteries or veins
4 major types
- Diffuse (e.g. scarlet fever)
- Morbiliformes → sarampo, mononucleose, toxidermia
- Roseoliformes → roseola sifilitica, exantema súbito, roseola medicamentosa
- Escarlatiniformes → escarlatina, erupção medicamentosa
- Eritrodermia
- Regional (e.g. palmar erythema; erysipelas)
- Reticulated (e.g. PAN)
- Dermatoses Figuradas definidas por um padrão anular
- São dermatoses é que a apresentação clínica é o critério de diagnóstico principal Erythema Annulare CentrifugumErythema Marginatum RheumaticumErythema MigransErythema Gyratum Repens | Gammel Syndrome
Erythemas of venous origin may be secondary to:
- Cold (e.g. erythrocyanosis, acrocyanosis)
- Heat (e.g. erythromelalgia)
- Abnormal function of arteriovenous communications (e.g. angiodyskinesia)
- Abnormal function of venous plexus (e.g. livedo reticularis)
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