Acanthosis nigricans - 黑棘皮病https://en.wikipedia.org/wiki/Acanthosis_nigricans
黑棘皮病 (Acanthosis nigricans) 是一種醫學症狀,特徵為皮膚呈棕黑色、邊界不清、呈天鵝絨狀的色素沉著過度。常見於身體皺摺處,如頸後側皺褶、腋下、腹股溝、肚臍、額頭等部位。此症與內分泌功能障礙有關,尤其是胰島素抗性與高胰島素血症,例如糖尿病患者常見。

原因
多發於 40 歲以下的個體,可能具有遺傳傾向,且常與肥胖或內分泌疾病相關,如甲狀腺功能減退症、肢端肥大症、多囊性卵巢病、胰島素抗性糖尿病或庫欣氏症。

治療 - 非處方藥
#40% urea cream
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  • 這在肥胖者中很常見。
  • 雙腋下有黑色素沉澱和皺紋顯示黑棘皮病 (Acanthosis nigricans)。
References Acanthosis Nigricans 28613711 
NIH
Acanthosis nigricans 是潛在疾病的皮膚表現。它常出現在頸部、腋窩、腹股溝等皮膚皺褶處,呈天鵝絨般的黑色斑塊,邊緣不清晰。此情況通常與糖尿病和胰島素阻抗相關,但在極少數情況下,可能提示體內存在癌症。它亦可能因荷爾蒙問題或使用類固醇、避孕藥等特定藥物而出現。
Acanthosis nigricans is a cutaneous manifestation of an underlying condition. It usually develops in skin folds, such as the back of the neck, axilla, and groin, where it presents as velvety hyper-pigmented patches with poorly defined borders. Acanthosis nigricans is most commonly associated with diabetes and insulin resistance, but rarely it can be a sign of internal malignancy. It can also occur with hormone disorders or with the use of certain medications like systemic glucocorticoids and oral contraceptives.
 Current treatment options for acanthosis nigricans 30122971 
NIH
Acanthosis nigricans (AN) 是一種常見的皮膚病,與胰島素抗性、糖尿病、肥胖、某些癌症、荷爾蒙問題以及藥物反應等多種健康問題相關。治療 AN 的重點在於解決潛在的健康問題。首先,醫師會檢查是否有胰島素抗性症候群的徵象,包括肥胖、高膽固醇、高血壓和第二型糖尿病。醫師常將 topical retinoids 作為第一線治療,因其可改善皮膚增厚,但可能無法完全消除皮膚變黑的現象。其他可選的治療方式包括 salicylic acid、podophyllin、urea 以及 calcipotriol,需依患者情況持續使用。
Acanthosis nigricans (AN) is a common dermatologic manifestation of systemic disease that is associated with insulin resistance, diabetes mellitus, obesity, internal malignancy, endocrine disorders, and drug reactions. Treatment of AN primarily focuses on resolution of the underlying disease processes causing the velvety, hyperpigmented, hyperkeratotic plaques found on the skin. Initial considerations for the AN workup include evaluating patients for insulin resistance syndrome characterized by obesity, dyslipidemia, hypertension, and diabetes mellitus type II. For cosmetic treatment, topical retinoids are considered the first-line therapy for insulin-resistant AN by modifying keratinization rate. However, topical tretinoin requires application for long durations and improves hyperkeratosis, but not hyperpigmentation. Topical salicylic acid, podophyllin, urea, and calcipotriol also require frequent application, while TCA peels may provide a faster and less time-intense burden.