White Piedra

Last Updated: 2023-07-07

Author(s): Anzengruber F., Navarini A.

ICD11: 1F2D.2

Beigel 1869

Trichomycosis nodosa, piedra alba, trichosporosis.

Hair shaft infection caused by the saprophytic yeast Trichosporon beigelii.

In particular found in the subtropics.


  • Trichosporon spp. especially T. beigelii

  • Whitish, derb palpable, pin-sized nodules in the area of the hair shaft
  • The hair often becomes brittle

In the area of the head, beard and underarm hair. Inguinal infestation.

  1. Patteson, R.G., Trichomycosis Nodosa: A Bacillary Disease of Hair. Br Med J, 1889. 1(1482): p. 1166-9.
  2. Avram, A., et al., [Clinical and mycological study of 11 cases of genitopubic trichosporosis nodosa (white piedra)]. Ann Dermatol Venereol, 1987. 114(6-7): p. 819-27.
  3. Roshan, A.S., C. Janaki, and B. Parveen, White piedra in a mother and daughter. Int J Trichology, 2009. 1(2): p. 140-1.
  4. Bonifaz, A., et al., Tinea versicolor, tinea nigra, white piedra, and black piedra. Clin Dermatol, 2010. 28(2): p. 140-5.