Consider different Tinea capitis presentations in children with hair loss.
"What can Tinea capitis look like? Anything," she said in a presentation at Skin Disease Education Foundation's Women's & Pediatric Dermatology Seminar.
Although T. capitis most often presents in children aged 3-7 years as a pattern of localized hair loss, often with scaling, sometimes with nodules, other possibilities include pustules, boggy masses, and diffuse hair loss, said Dr. Friedlander, professor of pediatrics and dermatology at the University of California, San Diego.
Sometimes, the hair loss may be so subtle that families come in complaining of "dandruff" rather than hair loss, she noted. Evaluating the patient for the presence of cervical or occipital lymph nodes is crucial; big nodes are usually a tip-off that infection is present.
The prevalence and etiology of tinea remains a moving target, and T. capitis varies with place and time, Dr. Friedlander observed. Historically, T. capitis has been most common in inner-city communities and developing countries, but "change is in the air," she said, citing recent epidemiologic data from countries including Egypt, Palestine, Kuwait, Tunisia, and Saudi Arabia showing Microsporum canis overtaking Trichophyton violaceum as the dominant organism causing T. capitis. The upswing in M. canis traces back to family pets, especially cats and dogs, but "don't forget hamsters," she said.
Clinicians treating T. capitis should ask about family pets, advised Dr. Friedlander, adding that city dwellers' conditions may be more likely caused by T. tonsurans, T. violaceum, or T. soudanense. Also consider immigration status and family history when evaluating T. capitis, and use a Wood's lamp for diagnosis if one is available, she advised. M. canis will fluoresce and T. tonsurans will not, she pointed out.
Other strategies to evaluate the condition include KOH, culture, polymerase chain reaction, and trichoscopy.
The optimal treatment plan for T. capitis depends on the source, Dr. Friedlander explained. If M. canis is the cause, "griseofulvin is the drug of choice," along with a twice-weekly spermicidal shampoo, she said.
Other treatment options include terbinafine, itraconazole, and fluconazole, and each have their pros and cons, she said. Terbinafine--which persists for months in the skin, nails, and hair--is the least expensive, and is her first choice for infections caused by T. tonsurans.
Itraconazole is available as a liquid, but costs more, causes diarrhea, and comes with a boxed warning about the potential for cardiac complications; fluconazole is the most expensive, but may be used in infants, she added.
Other high-risk groups for T. capitis include female caretakers of high-risk individuals, such as "grandma"; wrestlers; and Buddhist monks, she said. "Short hair, sharing combs, and unclean barbers" contributed to a documented increased risk of T. capitis according to a recently published study of 60 Buddhist monks whose average age was 11.6 years, she added. (Pediatr Dermatol. 2017 May;34:371-3).
Dr. Friedlander had no relevant financial conflicts to disclose.
SDEF and this news organization are owned by the same parent company.
BY HEIDI SPLETE
REPORTING FROM SDEF WOMEN'S & PEDIATRIC DERMATOLOGY SEMINAR
COMMENTARY BY DR. SIDBURY
TINEA CAPITIS can look like "anything," according to Dr. Sheila Friedlander. Three of the four cardinal signs can be seen in common inflammatory mimics such as psoriasis or seborrheic dermatitis: alopecia, erythema, and scaling.The fourth, lymphadenopathy, while not specific, is more suggestive of an infectious process. Bedside diagnostic tools like a KOH (potassium hydroxide) exam can confirm diagnosis, but speciation requires tests like fungal culture, which will take as long as a month.
Dr. Friedlander advises that a history and Wood's light exam can offer earlier clues. Pet ownership--including dogs, cats, and even hamsters --might suggest Microsporum canis infection as would fluorescence with a Wood's light.This matters, according to Dr. Friedlander, as griseofulvin is her first-line choice for M. canis infections, whereas for Trichophyton infections, she prefers terbinafine.
Please Note: Illustration(s) are not available due to copyright restrictions.
Caption: "What can Tinea capitis look like? Anything," said Dr. Sheila Fallon Friedlander.
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|Date:||Jun 1, 2018|
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