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Other names: Trichosporosis[1]: 312 
White piedra-KOH 10% wet mount of affected hairs showed septate hyaline hyphae arranged perpendicular to hair shaft

Piedra is a hair disease caused by a fungus, clumps of which form nodules on the hair shaft.[2]

Types include white piedra and black piedra.[2]


  1. James, William D.; Berger, Timothy G.; et al. (2006). Andrews' Diseases of the Skin: clinical Dermatology. Saunders Elsevier. ISBN 0-7216-2921-0.
  2. 2.0 2.1 Morris-Jones, Rachael (2019). "18. Tropical dermatology". In Morris-Jones, Rachael (ed.). ABC of Dermatology (7th ed.). Hoboken: Wiley Blackwell. p. 151. ISBN 978-1-119-48899-6. Archived from the original on 2022-05-16. Retrieved 2022-05-17.

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