How is acanthosis nigricans (AN) treated?

Updated: Oct 14, 2020
  • Author: Jason H Miller, MD; Chief Editor: William D James, MD  more...
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No treatment of choice exists for acanthosis nigricans (AN). [24] The goal of therapy is to correct the underlying disease process. Treatment of the lesions of acanthosis nigricans is for cosmetic reasons only. Correction of hyperinsulinemia often reduces the burden of hyperkeratotic lesions. Likewise, weight reduction in obesity-associated acanthosis nigricans may result in resolution of the dermatosis.

Cessation of the inciting agent in drug-induced acanthosis nigricans often results in resolution. Acipimox may be used in place of nicotinic acid to induce acanthosis nigricans regression while improving the lipid profile. [25] Dietary fish oil reportedly is beneficial in patients with lipodystrophic diabetes and generalized acanthosis nigricans, even if niacin is continued. [26]

Topical medications that have been effective in some cases of acanthosis nigricans include keratolytics (eg, topical tretinoin 0.05%, ammonium lactate 12% cream, or a combination of the 2) and triple-combination depigmenting cream (tretinoin 0.05%, hydroquinone 4%, fluocinolone acetonide 0.01%) nightly with daily sunscreen. [27] Calcipotriol, podophyllin, urea, adapalene, and salicylic acid also have been reported, with variable results. [1, 28, 29]

Oral agents that have shown some benefit include etretinate, [30] isotretinoin, [31, 32] metformin, [33] and dietary fish oils. [34] Octreotide showed sustained improvement in one patient with insulin resistance 6 months after completing the course. [35]

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