Confluent and Reticulated Papillomatosis Resembling Pityriasis Versicolor and Acanthosis Nigricans: Case Report
- PMID: 37632912
- PMCID: PMC10335129
- DOI: 10.2196/41245
Confluent and Reticulated Papillomatosis Resembling Pityriasis Versicolor and Acanthosis Nigricans: Case Report
Abstract
Confluent and reticulated papillomatosis (CARP) is a rare disorder mostly seen in young adults. It is characterized by persistent dull-brown, centrally confluent, peripherally reticulate macules and papules, which coalesce to form patches and plaques on the upper trunk and neck. It is commonly confused with pityriasis versicolor and acanthosis nigricans (AN). We report the case of a 15-year-old male with multiple pigmented confluent and reticulated patches and plaques on the neck, trunk, and chin for 3 years, which was successfully treated with oral minocycline, resulting in complete resolution of lesions within 2 weeks. The morphology of CARP resembles that of various other dermatological conditions such as AN and pityriasis versicolor, and, as a result, it is frequently misdiagnosed and mistreated, leading to social embarrassment for the patient. Therefore, it is prudent for dermatologists to carry out comprehensive clinical and histopathological assessments to facilitate prompt diagnosis and management of this condition.
Keywords: CARP; acanthosis nigricans; confluent and reticulated papillomatosis; minocycline; pityriasis versicolor.
©Abhinav David, Divyanshu Srivastava. Originally published in JMIR Dermatology (http://derma.jmir.org), 02.03.2023.
Conflict of interest statement
Conflicts of Interest: None declared.
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References
-
- Yesudian P, Kamalam S, Razack A. Confluent and reticulated papillomatosis (Gougerot-Carteaud). An abnormal host reaction to Malassezzia furfur. Acta Derm Venereol. 1973;53(5):381–4. - PubMed
-
- Sudy E, Urbina F, Gubelin W, Misad C, Espinoza A. Pseudoatrophoderma colli: distinct entity or just a variant of confluent and reticular papilomatosis of Gougerot-Carteaud. Dermatol Online J. 2020 Oct 15;26(10):1–9. http://escholarship.org/uc/item/9q40r8v8 13030/qt9q40r8v8 - PubMed
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