ContentsSynopsisCodesLook ForDiagnostic PearlsDifferential Diagnosis & PitfallsBest TestsManagement PearlsTherapyReferencesView all Images (3)
Tinea imbricata in Child
Print
Other Resources UpToDate PubMed

Tinea imbricata in Child

Print Images (3)
Contributors: Edith Lederman MD, Noah Craft MD, PhD, Susan Burgin MD, Keith Morley MD
Other Resources UpToDate PubMed

Synopsis

Tinea imbricata is a slowly progressive, chronic, superficial fungal infection caused by the dermatophyte Trichophyton concentricum, highly endemic to areas of Asia, the South Pacific, and Central and South America.

Lesions begin as small, brown, pruritic macules and papules and progress to concentric rings of scales. The infection usually begins in childhood, and progresses slowly over time. Over 75% of those affected will have lesions covering 50% or more of their skin surface. The lesions are quite pruritic, and the pruritus is aggravated by heat. Areas of lichenification develop after chronic excoriation. As this infection is superficial, patients do not have accompanying constitutional symptoms.

Risk factors include sharing an ancestry with endemic populations (travelers do not seem to develop this condition even after long stays and close contact), low socioeconomic class, and poor hygiene. Females are more commonly affected in the adult population; this sex ratio is reversed in children. Environmental exposures have not been linked to infection. A T-cell defect caused by an autosomal recessive trait has been suggested, but not proven.

Codes

ICD10CM:
B35.5 – Tinea imbricata

SNOMEDCT:
240699006 – Tinea imbricata

Look For

Subscription Required

Diagnostic Pearls

Subscription Required

Differential Diagnosis & Pitfalls

  • The scale on the lesions of psoriasis is finer, and removal of the scale results in pinpoint bleeding (Auspitz sign).
  • The plaques of nummular dermatitis are smaller and do not have rings of scale.
  • Small plaque parapsoriasis – Digitate dermatosis lesions are more linear and follow lines of cleavage.
  • Ichthyosis vulgaris
  • Tinea corporis
  • Tinea indecisiva (tinea pseudoimbricata) – tinea corporis that mimics tinea imbricata. These cases are not caused by Trichophyton concentricum but rather by other Trichophyton or Microsporum species. There is usually underlying immunosuppression in patients with tinea indecisiva.
  • Cutaneous T-cell lymphoma

Best Tests

Subscription Required

Management Pearls

Subscription Required

Therapy

Subscription Required

References

Subscription Required

Last Updated: 09/25/2018
Copyright © 2019 VisualDx®. All rights reserved.
Tinea imbricata in Child
Print 3 Images
View all Images (3)
(with subscription)
Tinea imbricata : Fine scaly plaque, Ichthyotic scaly plaque, Annular configuration
Clinical image of Tinea imbricata
Copyright © 2019 VisualDx®. All rights reserved.