Erythema annulare centrifugum - 離心性環狀紅斑
與這張圖相反，更常見的是病灶沒有結垢。
References
Erythema annulare centrifugum (EAC) 是一种红色皮疹，呈環形並向外擴散，留下清晰的中心。當 EAC 因癌症而出現時，稱為 PEACE (paraneoplastic erythema annulare centrifugum eruption) 。 PEACE 在女性中更為常見，通常出現在癌症診斷之前，並且可能在治療後復發。 EAC 是環形皮疹的主要類型之一，與其他主要的圖形紅斑 (erythema marginatum, erythema migrans, and erythema gyratum repens) 相比具有獨特的特徵。
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) 是一種紅色皮疹，呈圓形，皮膚通常呈片狀。人們認為它是由多種因素觸發的，但我們不確定它到底是如何發生的。皮疹平均持續約 11 個月。我們討論了一位患有 EAC 50 年但沒有明確原因復發的患者。雖然這種情況似乎確實會在一年中的某些時候出現，但該病例代表了所報告的 EAC 持續時間最長的一次。
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.
這些病灶發生在任何年齡，表現為凸起的粉紅色環或靶心標記。它們的尺寸範圍為 0.5–8 公分（0.20–3.15 英吋）。隨著時間的推移，病變有時會增大並擴散，並且可能不是完整的環形，而是不規則的形狀。
可以進行皮膚切片檢查來確認疾病。病灶可能從任何地方持續，平均持續時間為 11 個月。通常不需要治療，但外用類固醇可能有助於減輕發紅、腫脹和搔癢。