Confluent and reticulated papillomatosis (CARP) is defined as a rare skin disorder characterized by hyperpigmented papules that are confluent in the center and reticulated at the periphery, primarily affecting the intermammary region, epigastric area, and upper back. Confluent and reticulated papillomatosis (CARP), also known as confluent and reticulated papillomatosis of Gougerot and Carteaud or Gougerot-Carteaud syndrome, is a rare cutaneous dermatosis of undetermined etiology with clinical features resembling acanthosis nigricans and tinea versicolor. Confluent and reticulated papillomatosis (CARP) is an uncommon dermatosis characterized by hyperpigmented scaly macules or papillomatous papules coalescing into confluent patches or plaques centrally with a reticular pattern peripherally (picture 1A-D).

Understanding the Context

Confluent and reticulated papillomatosis (CARP) is a rare dermatologic condition with a variety of potential etiologies and associations. The clinical presentation often mimics other dermatologic disorders, making a careful differential diagnosis essential. Confluent and reticulated papillomatosis (CARP) of Gougerot and Carteaud is a rare chronic disease with exacerbation and remissions typically affecting young people. Confluent and reticulated papillomatosis (CARP) is a rare and distinctive skin condition characterized by the presence of brownish or grayish papules that coalesce and form a reticulated pattern on the skin surface.

Key Insights

To the Editor: Confluent and reticulated papillomatosis (CARP) is a rare dermatosis characterized by persistent, hyperpigmented, reticulated papules and plaques. 1