Confluent and Reticulated Papillomatosis (CRP) - black skin - stock photo
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Confluent and Reticulated Papillomatosis (CRP) - black skin

A 35 years old healthy man (of North African descent), Fitzpatrick skin Phototype VI, was referred for generalized skin pigmentation which started two years earlier. The eruption was characterised by the appearance of small, brownish hyperkeratotic papules which are asymptomatic and located on the chest region and upper back. His hair and nails were normal. It was a Confluent and Reticulated Papillomatosis (CRP). It occurs predominantly in young adults and teenagers. The histologic features of CRP include hyperkeratosis, papillomatosis, and acanthosis with a mild-to-moderate increase in pigmentation. Dermoscopy signs were brownish pigmentation with poorly defined edges, covered with white scales. The diagnosis of CRP is made largely on a clinical basis. The differential diagnosis is made mostly with tinea versicolor, especially in black skin patients. Therapeutic measures are : topical retinoids, urea, calcipotriol, and tacrolimus 0.1%. Systemic treatments are various but minocycline and tetracyclines are considered as the first-line treatment. Fitzpatrick skin type (FST) phototype 6.

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