Pityriasis Rosea: The Daily PANCE Blueprint

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Pityriasis Rosea: The Daily PANCE Blueprint

A 22-year-old female presents to your clinic with a one-week history of a rash. She first noticed a single, oval-shaped, slightly raised lesion on her trunk. A few days later, a more widespread rash erupted, primarily on her chest, back, and proximal extremities, following skin cleavage lines. The rash is mildly pruritic. She denies any recent illnesses, medication changes, or new exposures. She is sexually active with one partner and uses condoms consistently. On physical examination, you observe a 2.5 cm, oval, salmon-colored, slightly scaly plaque on her right flank (herald patch). There are numerous smaller, similar-appearing, oval macules and patches with a fine collarette of scale distributed in a "Christmas tree" pattern on her trunk and proximal extremities. There is no involvement of her palms or soles. What is the most appropriate management for this patient?

A. Prescribe topical ketoconazole cream
B. Prescribe oral acyclovir
C. Reassurance and observation
D. Prescribe topical mupirocin ointment
E. Perform a skin biopsy to confirm the diagnosis

Answer and topic summary

The answer is C. Reassurance and observation

This patient’s presentation is classic for pityriasis rosea (PR), a benign, self-limited skin condition of unknown etiology, although some evidence suggests a viral cause (HHV-6 or HHV-7). The rash typically begins with a “herald patch,” which is a single, larger, oval lesion, followed by a more widespread eruption of smaller, oval, salmon-colored macules and patches with a fine collarette of scale that often follows skin cleavage lines in a “Christmas tree” pattern. PR is usually asymptomatic, although some patients experience mild pruritus. The condition typically resolves spontaneously within 6-8 weeks, and treatment is generally not necessary. Reassurance and observation are appropriate for most patients. Topical corticosteroids or oral antihistamines can be used to manage pruritus if needed, but they do not alter the course of the disease.

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Smarty PANCE Content Blueprint Review:

Covered under ⇒ PANCE Blueprint Dermatology ⇒ Papulosquamous Disorders ⇒ Pityriasis rosea

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