Case Study : Infection and Sepsis

71. Tinea Capitis

Gratefully sourced with permission from Photo Rounds in The Journal of Family Practice

71. Hair loss on scalp

A 6-year-old boy was brought to his family physician (FP) after his mother noticed areas of hair loss and a rash on his scalp. The mother said that she didn’t know how long this had been going on, but it had become noticeable after his recent haircut. The boy had no symptoms and was otherwise in good health

Tinea Capitis

The Family Physician (FP) noted patchy alopecia with scaling of the scalp and made the presumptive diagnosis of tinea capitis.

A woods lamp examination did not demonstrate fluorescence.

The child was very cooperative and the doctor was able to perform a potassium hydroxide (KOH) preparation by scraping the areas of alopecia with the edge of one glass slide while catching the scale on another slide.

Microscopic examination revealed branching hyphae and some broken hairs with fungal elements within the hair shaft.

This microscopic picture was consistent with Trichophyton tonsurans, the most common cause of tinea capitis in the United States.

The reason that the infected area did not fluoresce was that the dermatophyte was within the hair shaft (endothrix) rather than external to the hair (exothrix).

Topical antifungal therapy is not adequate for tinea capitis; oral treatment is needed.

Oral antifungal choices include griseofulvin, terbinafine, and fluconazole.

 

Griseofulvin comes in an oral suspension making it a desirable option for children who can’t swallow pills.

However, at least 6 to 8 weeks of treatment (20 mg/kg/d) is required.

Oral terbinafine tablets are less expensive and shorter courses of therapy may be used.

Tablets of 250 mg terbinafine (most affordable of all the choices) can be broken in half for younger children and the dose should always be calculated based on weight.

Fluconazole comes in various tablets, strengths, and liquid formulations and can be prescribed for 3 to 6 weeks, as needed.

REFERENCES

Photos and text for Photo Rounds Friday courtesy of Richard P. Usatine, MD. This case was adapted from: Usatine R, Yao C. Tinea capitis. In: Usatine R, Smith M, Mayeaux EJ, et al, eds. Color Atlas of Family Medicine. 2nd ed. New York, NY: McGraw-Hill;2013:782-787.

Copyright  © 2017 Frontline Medical Communications Inc., Parsippany, NJ, USA. All rights reserved. Unauthorized use prohibited.The information provided is for educational purposes only. Use of this Web site is subject to the medical disclaimer and privacy policy.

 

Griseofulvin is n/a in Ireland

Terbinafine is available in Ireland as Lamisil

Fluconazole is available in Ireland as Diflucan

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