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A Benign yet Unsightly Rash.

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  • 1Assistant Professor, Department of Dermatology, Sri Madhusudan Sai Institute of Medical Sciences & Research, Chikkaballapur, Karnataka, India, Corresponding Author, Orcid: https://orcid.org/0000-0002-4361-5537.

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Confluent and reticulated papillomatosis (CARP) is a rare skin condition presenting as brown, net-like lesions. Oral doxycycline effectively treated this cosmetically distressing rash in a 40-year-old Indian woman.

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Area of Science:

  • Dermatology
  • Clinical Case Study

Background:

  • Confluent and reticulated papillomatosis (CARP) is an uncommon dermatosis characterized by reticulated, hyperpigmented plaques.
  • The etiology of CARP remains unclear, with various theories including bacterial infection and hormonal influences.
  • Patients often present with asymptomatic, cosmetically concerning lesions on the trunk and neck.

Purpose of the Study:

  • To report a case of CARP in an adult Indian female.
  • To highlight the diagnostic challenges and successful treatment of this condition.

Main Methods:

  • A clinical diagnosis of CARP was made in a 40-year-old woman with a 10-year history of asymptomatic, reticulated brown plaques.
  • Fungal scrapings were negative, and a biopsy was declined.
  • The patient was treated with a 4-week course of oral doxycycline.

Main Results:

  • The patient experienced a dramatic clearance of the rash one month after completing doxycycline treatment.
  • The rapid improvement strongly supported the diagnosis of CARP.
  • The treatment was well-tolerated without adverse effects.

Conclusions:

  • Oral doxycycline is an effective treatment for confluent and reticulated papillomatosis.
  • This case underscores the importance of recognizing CARP for appropriate management of this benign, yet cosmetically significant condition.
  • Early diagnosis and treatment can significantly improve patient quality of life.