Overview
What is Malassezia (Pityrosporum) folliculitis?
What is the pathophysiology of Malassezia (Pityrosporum) folliculitis?
What causes Malassezia (Pityrosporum) folliculitis?
What are the risk factors for Malassezia (Pityrosporum) folliculitis?
What is the prevalence of Malassezia (Pityrosporum) folliculitis cases in the US?
What is the global prevalence of Malassezia (Pityrosporum) folliculitis?
What are the racial predilections of Malassezia (Pityrosporum) folliculitis?
How does the prevalence of Malassezia (Pityrosporum) folliculitis vary between sexes?
Which age groups have the highest prevalence of Malassezia (Pityrosporum) folliculitis?
What is the prognosis of Malassezia (Pityrosporum) folliculitis?
Presentation
Which clinical history findings are characteristic of Malassezia (Pityrosporum) folliculitis?
Which physical findings are characteristic of Malassezia (Pityrosporum) folliculitis?
DDX
What are diagnostic considerations in Malassezia (Pityrosporum) folliculitis?
What are the differential diagnoses for Malassezia (Pityrosporum) Folliculitis?
Workup
What is the role of lab tests in the workup of Malassezia (Pityrosporum) folliculitis?
Which histologic findings are characteristic of Malassezia (Pityrosporum) folliculitis?
Treatment
What are the treatment options for Malassezia (Pityrosporum) folliculitis?
Which specialists should be consulted in the treatment of Malassezia (Pityrosporum) folliculitis?
How is Malassezia (Pityrosporum) folliculitis prevented?
What is included in long-term monitoring for patients with Malassezia (Pityrosporum) folliculitis?
Medications
What is the goal of drug treatment for Malassezia (Pityrosporum) folliculitis?
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This photo is high-power hematoxylin and eosin staining of a biopsy confirming Pityrosporum folliculitis. There is a hair shaft within a hair follicle with scattered amphophilic staining circular Pityrosporum yeast. Courtesy of Ronald Rapini, MD.
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Left: A 25-year-old man with complaints of slightly pruritic, monomorphic follicular papules, pustules, and secondary keloid on the upper trunk and neck. Right: Scanning electron microscopy of the hair follicle from the upper trunk. This demonstrated a large number of globular or orbicular-ovate yeasts of budding daughter cell, with collar structure around the budding. Courtesy of Wikimedia Commons by Ran Yuping et al (https://commons.wikimedia.org/wiki/File:Pityrosporum_folliculitis_2.jpg).