Pityriasis Rosea: An Updated Review

Area of Science:

• Dermatology
• Pediatrics
• Infectious Diseases

Background:

• Pityriasis rosea is an acute, self-limited papulosquamous dermatosis common in children and young adults.
• Diagnostic challenges arise from clinical variants and the absence of the characteristic herald patch.

Purpose of the Study:

• To update pediatricians on the clinical manifestations, evaluation, diagnosis, and management of pityriasis rosea.
• To provide guidance on recognizing and managing pityriasis rosea and its variants.

Main Methods:

• A comprehensive literature search was conducted in March 2020 using "pityriasis rosea" in Pubmed Clinical Queries.
• Included studies were clinical trials, observational studies, and reviews published in English within the last 10 years.

Main Results:

• Pityriasis rosea predominantly affects individuals aged 10-35, with potential links to human herpesviruses (HHV)-6 and HHV-7.
• The classic presentation includes a herald patch followed by a generalized eruption with oval, scaly lesions along skin cleavage lines, often forming a "Christmas tree" pattern.
• Most cases resolve within 6-8 weeks with symptomatic treatment; severe or recurrent cases, or those in pregnant women, may warrant active intervention such as oral acyclovir.

Conclusions:

• Pityriasis rosea is a common, self-limiting exanthematous disease primarily affecting children and young adults.
• Classical presentations are easily diagnosed, but variants can challenge pediatricians.
• Understanding the disease is crucial for prompt diagnosis and avoiding unnecessary investigations.