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Pityrosporum folliculitis: A retrospective review of 110 cases.
J Am Acad Dermatol. 2018 03; 78(3):511-514.JA

Abstract

BACKGROUND

Pityrosporum folliculitis is an under-recognized eruption of the face and upper portion of the trunk that may be confused with, or occur simultaneously with, acne vulgaris.

OBJECTIVE

We sought to characterize risk factors for Pityrosporum folliculitis, its clinical presentation, and its response to treatment.

METHODS

A retrospective chart review was performed on all patients age 0 to 21 years seen at our facility from 2010 to 2015 with Pityrosporum folliculitis confirmed by a potassium hydroxide preparation.

RESULTS

Of 110 qualifying patients, more than 75% had acne that had recently been treated with antibiotics, and when recorded, 65% reported pruritus. Clinical examination demonstrated numerous 1- to 2-mm monomorphic papules and pustules that were typically on the forehead extending into the hairline and on the upper portion of the back. The most common treatment was ketoconazole shampoo, which led to improvement or resolution in most cases. Some patients required oral azole antifungals.

LIMITATIONS

This study was retrospective and relied on providers describing and interpreting the clinical findings and potassium hydroxide preparations. No standard grading system was used.

CONCLUSION

Unlike classic acne vulgaris, Pityrosporum folliculitis was more common after antibiotic use. It presented as fine monomorphic, pruritic papules and pustules along the hairline and on the upper portion of the back, and it improved with topical or oral azole antifungal therapy.

Authors+Show Affiliations

Department of Dermatology, University of Massachusetts Medical School, Worcester, Massachusetts. Electronic address: brea.prindaville@alum.dartmouth.org.Department of Dermatology, University of Massachusetts Medical School, Worcester, Massachusetts.Department of Dermatology, University of Massachusetts Medical School, Worcester, Massachusetts.Department of Dermatology, University of Massachusetts Medical School, Worcester, Massachusetts.

Pub Type(s)

Journal Article

Language

eng

PubMed ID

29138059

Citation

Prindaville, Brea, et al. "Pityrosporum Folliculitis: a Retrospective Review of 110 Cases." Journal of the American Academy of Dermatology, vol. 78, no. 3, 2018, pp. 511-514.
Prindaville B, Belazarian L, Levin NA, et al. Pityrosporum folliculitis: A retrospective review of 110 cases. J Am Acad Dermatol. 2018;78(3):511-514.
Prindaville, B., Belazarian, L., Levin, N. A., & Wiss, K. (2018). Pityrosporum folliculitis: A retrospective review of 110 cases. Journal of the American Academy of Dermatology, 78(3), 511-514. https://doi.org/10.1016/j.jaad.2017.11.022
Prindaville B, et al. Pityrosporum Folliculitis: a Retrospective Review of 110 Cases. J Am Acad Dermatol. 2018;78(3):511-514. PubMed PMID: 29138059.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Pityrosporum folliculitis: A retrospective review of 110 cases. AU - Prindaville,Brea, AU - Belazarian,Leah, AU - Levin,Nikki A, AU - Wiss,Karen, Y1 - 2017/11/11/ PY - 2017/07/03/received PY - 2017/10/31/revised PY - 2017/11/04/accepted PY - 2017/11/16/pubmed PY - 2018/10/13/medline PY - 2017/11/16/entrez KW - Malassezia KW - Pityrosporum KW - Pityrosporum folliculitis KW - acne KW - acne vulgaris KW - folliculitis KW - pediatric SP - 511 EP - 514 JF - Journal of the American Academy of Dermatology JO - J. Am. Acad. Dermatol. VL - 78 IS - 3 N2 - BACKGROUND: Pityrosporum folliculitis is an under-recognized eruption of the face and upper portion of the trunk that may be confused with, or occur simultaneously with, acne vulgaris. OBJECTIVE: We sought to characterize risk factors for Pityrosporum folliculitis, its clinical presentation, and its response to treatment. METHODS: A retrospective chart review was performed on all patients age 0 to 21 years seen at our facility from 2010 to 2015 with Pityrosporum folliculitis confirmed by a potassium hydroxide preparation. RESULTS: Of 110 qualifying patients, more than 75% had acne that had recently been treated with antibiotics, and when recorded, 65% reported pruritus. Clinical examination demonstrated numerous 1- to 2-mm monomorphic papules and pustules that were typically on the forehead extending into the hairline and on the upper portion of the back. The most common treatment was ketoconazole shampoo, which led to improvement or resolution in most cases. Some patients required oral azole antifungals. LIMITATIONS: This study was retrospective and relied on providers describing and interpreting the clinical findings and potassium hydroxide preparations. No standard grading system was used. CONCLUSION: Unlike classic acne vulgaris, Pityrosporum folliculitis was more common after antibiotic use. It presented as fine monomorphic, pruritic papules and pustules along the hairline and on the upper portion of the back, and it improved with topical or oral azole antifungal therapy. SN - 1097-6787 UR - https://www.unboundmedicine.com/medline/citation/29138059/Pityrosporum_folliculitis:_A_retrospective_review_of_110_cases_ L2 - https://linkinghub.elsevier.com/retrieve/pii/S0190-9622(17)32687-7 DB - PRIME DP - Unbound Medicine ER -