Erythema annulare centrifugum - 离心性环状红斑
与这张图相反，更常见的是病灶没有结垢。
References
Erythema annulare centrifugum (EAC) 是一种红色皮疹，呈环形并向外扩散，留下清晰的中心。当 EAC 因癌症而出现时，称为 PEACE (paraneoplastic erythema annulare centrifugum eruption) 。 PEACE 在女性中更为常见，通常出现在癌症诊断之前，并且可能在治疗后复发。 EAC 是环形皮疹的主要类型之一，与其他主要的图形红斑 (erythema marginatum, erythema migrans, and erythema gyratum repens) 相比具有独特的特征。
Erythema annulare centrifugum (EAC) is an annular, erythematous lesion that appears as urticarial-like papules and enlarges centrifugally, then clears centrally. A fine scale is sometimes present inside the advancing edge, known as a trailing scale. Erythema annulare centrifugum is classified as a reactive erythema and has been associated with various underlying conditions, including malignancies. When erythema annulare centrifugum occurs as a paraneoplastic phenomenon, it has been designated PEACE (paraneoplastic erythema annulare centrifugum eruption). PEACE is more commonly seen in females, typically precedes the clinical diagnosis of malignancy, and may recur with subsequent relapses. EAC is one of the three major figurate erythemas, with EAC being the most common. These dermatoses share the common presentation of advancing erythematous, annular lesions, but are each separated by unique clinical and histopathologic characteristics. Once the other major figurate erythemas (erythema marginatum, erythema migrans, and erythema gyratum repens) are excluded, EAC often becomes a diagnosis of exclusion.
Erythema annulare centrifugum (EAC) is an annular, erythematous lesion that appears as urticarial-like papules and enlarges centrifugally, then clears centrally. A fine scale is sometimes present inside the advancing edge, known as a trailing scale. Erythema annulare centrifugum is classified as a reactive erythema and has been associated with various underlying conditions, including malignancies. When erythema annulare centrifugum occurs as a paraneoplastic phenomenon, it has been designated PEACE (paraneoplastic erythema annulare centrifugum eruption). PEACE is more commonly seen in females, typically precedes the clinical diagnosis of malignancy, and may recur with subsequent relapses. EAC is one of the three major figurate erythemas, with EAC being the most common. These dermatoses share the common presentation of advancing erythematous, annular lesions, but are each separated by unique clinical and histopathologic characteristics. Once the other major figurate erythemas (erythema marginatum, erythema migrans, and erythema gyratum repens) are excluded, EAC often becomes a diagnosis of exclusion.
Erythema annulare centrifugum (EAC) 是一种红色皮疹，呈圆形，皮肤通常呈片状。人们认为它是由多种因素触发的，但我们不确定它到底是如何发生的。皮疹平均持续约 11 个月。我们讨论了一位患有 EAC 50 年但没有明确原因复发的患者。虽然这种情况似乎确实会在一年中的某些时候出现，但该病例代表了所报告的 EAC 持续时间最长的一次。
Erythema annulare centrifugum (EAC) is a type of red rash that forms circular shapes and often has flaky skin. It's thought to be triggered by various factors, but we're not sure exactly how it happens. On average, the rash lasts for about 11 months. We discuss a patient who has had EAC coming back for 50 years without a clear reason. While it does seem to come back at certain times of the year, this case represents the longest reported duration of EAC.
Erythema annulare centrifugum (EAC) is a type of red rash that forms circular shapes and often has flaky skin. It's thought to be triggered by various factors, but we're not sure exactly how it happens. On average, the rash lasts for about 11 months. We discuss a patient who has had EAC coming back for 50 years without a clear reason. While it does seem to come back at certain times of the year, this case represents the longest reported duration of EAC.
这些病变发生在任何年龄，表现为凸起的粉红色环或靶心标记。它们的尺寸范围为 0.5–8 厘米（0.20–3.15 英寸）。随着时间的推移，病变有时会增大并扩散，并且可能不是完整的环形，而是不规则的形状。
可以进行皮肤活检来确认疾病。病变可能从任何地方持续，平均持续时间为 11 个月。通常不需要治疗，但外用类固醇可能有助于减轻发红、肿胀和瘙痒。