Acanthosis nigricanshttps://en.wikipedia.org/wiki/Acanthosis_nigricans
Acanthosis nigricans o se fa'ailoga fa'afoma'i e fa'aalia i le lanu enaena-i-uliuli, e le lelei ona fa'amalamalamaina, e pei o le hyperpigmentation evelvety o le pa'u. E masani lava ona maua i gaugau o le tino, e pei o le pito i tua ma le pito i tua o le ua, o le lima, tumu, pute, muaulu ma isi vaega. E fesoʻotaʻi ma le faʻaleagaina o le endocrine, aemaise lava le faʻamalosia o le inisalini ma le hyperinsulinemia, e pei ona vaaia i le maʻi suka.

Mafuaaga
E masani ona tupu i tagata e laiti ifo i le 40 tausaga, atonu e maua mai i le kenera ma e feso'ota'i ma le puta po'o le endocrinopathies, e pei o le hypothyroidism, acromegaly, polycystic ovary disease, insulin-resistant diabetes po'o le Cushing's disease.

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  • E taatele i tagata lapopoa.
  • O le lanu uliuli ma le maanuminumi i vae e lua e fautua mai ai Acanthosis nigricans.
References Acanthosis Nigricans 28613711 
NIH
Acanthosis nigricans o se fa'aaliga i le pa'u o se tulaga fa'avae. E masani ona aliali mai i gaugau pa'u e pei o le ua, tapuvae, ma le ga'o, e foliga mai e pei o ni pa'u lanu uliuli e le manino ona pito. Ole tulaga lea e masani ona feso'ota'i ile ma'i suka ma le inisalini tete'e, ae ise tulaga e seasea tupu, e mafai ona fa'asino ile kanesa ile tino. E ono alia'e fo'i ona o fa'afitauli o le homone po'o le inuina o vaila'au fa'apitoa e pei o vaila'au fa'ama'i ma fualaau fa'anatinati.
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) ose ma'i masani o le pa'u e feso'ota'i ma fa'afitauli fa'alesoifua maloloina e pei o le tete'e o le inisalini, ma'i suka, tino puta, ma'i kanesa, fa'afitauli o le hormonal, ma tali atu i vaila'au. O le togafitia o le AN e taula'i i le fa'atalanoaina o fa'afitauli fa'alesoifua maloloina. I le taimi muamua, e siaki e fomaʻi ni faailoga o le insulin resistance syndrome, lea e aofia ai le puta, maualuga cholesterol, toto maualuga, ma le maʻisuka ituaiga 2. E masani ona fa'atonu e foma'i le topical retinoids e fai ma filifiliga muamua o togafitiga, e mafai ona fesoasoani i le mafiafia o le pa'u. Ae ui i lea, atonu latou te le faʻatalanoaina atoatoa le faʻapogisaina o le paʻu. O isi togafitiga (salicylic acid, podophyllin, urea, calcipotriol) e manaʻomia foʻi le faʻaoga masani.
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.