Erythema annulare centrifugum - 乳頭状色素沈着症
この写真とは対照的に、病変に鱗屑がないことの方が一般的です。
relevance score : -100.0%
ReferencesErythema annulare centrifugum (EAC) は、中心部がはっきりとした状態で外側に向かって輪状に広がる赤い発疹の一種です。EAC が癌に伴って出現した場合は、PEACE (paraneoplastic erythema annulare centrifugum eruption) と呼ばれます。PEACE は女性に多く見られ、がんが診断される前に出現することが多く、治療後に再発することもあります。EAC はリング状発疹の主要なタイプのひとつであり、他の主要な形状紅斑（erythema marginatum、erythema migrans、erythema gyratum repens）と比較して独特の特徴があります。
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) は、円形の赤い発疹で、皮膚が薄片状になることがよくあります。さまざまな要因が関与すると考えられていますが、発症メカニズムはまだ明らかではありません。平均的に発疹は約 11 か月続きます。ここでは、明確な原因が特定できないまま、50 年間にわたり EAC が再発し続けた患者について報告します。発作は毎年特定の時期に再発するようです。この症例は、報告されている中で最も長期間にわたる EAC の例です。
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.
あらゆる年齢で発症し、隆起したピンク色のリングまたはブルズアイマークとして現れます。サイズは 0.5～8 cm（0.20～3.15 インチ）です。病変は時間とともに拡大し、完全なリングではなく不規則な形になることがあります。
診断のために皮膚生検を行うことができます。病変はどこにでも出現し、平均持続期間は約 11 か月です。通常は治療を要しませんが、局所ステロイドは紅斑、腫れ、かゆみの軽減に有効な場合があります。