Confluent and reticulated papillomatosis of Gougerot and Carteaud.

Confluent and reticulated papillomatosis is a rarely reported dermatosis of unknown origin. It is similar to nummular and confluent papillomatosis; punctate, pigmented verrucose papillomatosis; acanthosis nigricans; pseudoacanthosis nigricans; benign acanthosis nigricans; pseudoatrophoderma colli; tinea versicolor; Darier's disease; epidermodysplasia verruciformis; and verruca plana. Treatment may be temporarily successful, but the lesions usually recur within a period of months.     

Confluent and reticulated papillomatosis without papillomatosis

Confluent and reticulated papillomatosis is a papulosquamous disorder that affects young individuals. There are several hypotheses regarding the cause, including genetic keratinization disorder, reaction to pityrosporum, and reaction to UV light. Multiple therapeutic agents have been used with variable success. The histologic findings include papillomatosis, hyperkeratosis, and minimal or no acanthosis. We present a patient with the clinical findings of confluent and reticulated papillomatosis who responded dramatically to minocycline, and in whom histologic examination did not reveal papillomatosis.     

Confluent and reticulated papillomatosis (Gougerot-Carteaud).

Seven cases, one female and six males with confluent and reticulated papillomatosis are presented. Age range was 13-25 years and the skin disease had lasted for 6 months to 3 years. Initially, acanthosis nigricans was suspected in all cases as the skin histology was compatible with that diagnosis. Pityrosporum orbiculare was cultured in 4 cases, but treatment with selenium sulfide and miconazole was unsuccessfull. No endocrinological abnormities were revealed. Only associated feature was a marked xeroderma. The importance of the awareness of the disease is stressed.     

Confluent and reticulate papillomatosis of Gougerot and Carteaud clearing with minocycline

Confluent and reticulate papillomatosis is a rare disorder producing sharply circumscribed hyperpigmented ichthyosiform scaling lesions in a seborrhoeic distribution. Its exact aetiology is unknown and its response to therapy is poor. This case is unusual in responding to minocycline having failed with the more conventional approaches.     

Confluent and reticulated papillomatosis (Gougerot-Carteaud) successfully treated with tacalcitol

Confluent and reticulated papillomatosis (CRP) is a rare dermatosis of unknown aetiology whose relationship to Malassezia furfur is still debated. Antifungal agents, antibiotics, retinoids, and, more recently, calcipotriol have been successfully used as treatment. The authors report on a 14-year-old female with confluent and reticulated papillomatosis in whom M. furfur was found. Anti-fungal therapy eliminated the fungus, but did not achieve the disappearance of the lesions. Further treatment with tacalcitol was successful, supporting the theory that CRP might be a disorder of keratinization. To the authors' knowledge, this is the first patient treated with tacalcitol for this entity.