Tinea versicolor: Difference between revisions
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==Background== | ==Background== | ||
{{Skin anatomy background images}} | |||
*Caused by fungus Pityrosporum ovale (oval form) or obiculare | *Caused by fungus Pityrosporum ovale (oval form) or obiculare | ||
*Also known as Malassezia furfur | *Also known as Malassezia furfur | ||
== | ==Clinical Features== | ||
*Hypopigmented or hyperpigmented lesions predominantly on the trunk | *Hypopigmented or hyperpigmented lesions predominantly on the trunk | ||
*Circular, scaly patches | |||
*More common in areas of increased sebaceous glands | *More common in areas of increased sebaceous glands | ||
*Poor hygiene, areas of moisture | |||
*Equally common is light and dark skinned individuals, but more noticeable in the later | *Equally common is light and dark skinned individuals, but more noticeable in the later | ||
[[File:tinea versicolor.JPG|thumbnail]] | |||
== | ==Differential Diagnosis== | ||
{{Pigmentation Change DDX}} | |||
==Evaluation== | |||
*Some demonstrate coppery-orange fluoresence under Woods Lamp | |||
*KOH wet prep (Spaghetti and Meatballs appearance) | |||
*Almost never cultured given difficult culture medium, benign course, and diagnostic KOH prep. | |||
==Management== | ==Management== | ||
*First line topical treatment is ketoconazole (nightly application x 2 weeks) or selenium sulfide (10 minutes x bid) | *First line topical treatment is [[ketoconazole]] (nightly application x 2 weeks) or [[selenium sulfide]] (10 minutes x bid) | ||
*Single dose 400mg ketoconazole PO or fluconazole 150-300mg PO per week x 2-4 weeks for more resistant cases or for easy-of-use | *Single dose 400mg [[ketoconazole]] PO or [[fluconazole]] 150-300mg PO per week x 2-4 weeks for more resistant cases or for easy-of-use | ||
*Griseofulvin is not effective | *Griseofulvin is not effective | ||
== See Also == | ==See Also== | ||
* | *[[Tinea]] | ||
[[Category: | ==References== | ||
<references/> | |||
[[Category:Dermatology]] | |||
[[Category:ID]] | |||
Latest revision as of 18:17, 11 December 2024
Background
- Caused by fungus Pityrosporum ovale (oval form) or obiculare
- Also known as Malassezia furfur
Clinical Features
- Hypopigmented or hyperpigmented lesions predominantly on the trunk
- Circular, scaly patches
- More common in areas of increased sebaceous glands
- Poor hygiene, areas of moisture
- Equally common is light and dark skinned individuals, but more noticeable in the later
Differential Diagnosis
Hyperpigmentation
- Postinflammatory hyperpigmentation (acne, Psoriasis, atopic and contact dermatitis, lichen planus, trauma, drugs, and fixed-drug eruptions)
- Melasma
- Solar lentigines
- Ephelides (freckles)
- Café-au-lait macules
- Nevi
- Melanoma and precursors
Hypopigmentation
- Vitiligo
- Pityriasis alba
- Tinea versicolor
- Postinflammatory hypopigmentation
- Piebaldism
- Tuberous sclerosis
- Hypomelanosis of Ito
Evaluation
- Some demonstrate coppery-orange fluoresence under Woods Lamp
- KOH wet prep (Spaghetti and Meatballs appearance)
- Almost never cultured given difficult culture medium, benign course, and diagnostic KOH prep.
Management
- First line topical treatment is ketoconazole (nightly application x 2 weeks) or selenium sulfide (10 minutes x bid)
- Single dose 400mg ketoconazole PO or fluconazole 150-300mg PO per week x 2-4 weeks for more resistant cases or for easy-of-use
- Griseofulvin is not effective