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Psoriasis-like tinea incognita: a case report and literature review

Laura Đorđević Betetto1, Borut Žgavec2, Aleksandra Bergant Suhodolčan2,3

  • 1Ljubljana Community Health Center, Ljubljana, Slovenia.

Acta Dermatovenerologica Alpina, Pannonica, Et Adriatica
|March 25, 2020
PubMed

Insights

Tinea incognita, a fungal skin infection altered by topical steroid misuse, presents atypically and is increasingly common. Diagnosis requires histopathology, especially when conventional treatments fail.

Area of Science:

  • Dermatology
  • Mycology
  • Pathology

Background:

  • Tinea incognita is an atypical fungal skin infection.
  • Its presentation is often modified by misuse of topical corticosteroids or calcineurin inhibitors.
  • Prevalence is rising due to increased immunosuppressive drug use and self-prescribed topical therapies.

Observation:

  • A 68-year-old male with a history of psoriasis presented with erythematous scaly lesions.
  • Lesions did not respond to conventional psoriasis treatments.
  • A skin biopsy with periodic acid-Schiff stain confirmed tinea incognita.

Findings:

  • Histopathological examination is crucial for diagnosing atypical fungal infections like tinea incognita.
  • Tinea incognita can mimic or coexist with other dermatoses, complicating diagnosis.
  • The case underscores the importance of considering fungal infections even with pre-existing skin conditions.

Implications:

  • Increased awareness of tinea incognita is needed among clinicians.
  • Proper diagnosis and treatment are essential to manage these increasingly prevalent infections.
  • This condition highlights the diagnostic challenges posed by modified dermatophyte infections.

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