White piedra (or tinea blanca) is a mycosis of the hair[1] caused by several species of fungi in the genus Trichosporon. It is characterized by soft nodules composed of yeast cells and arthroconidia that encompass hair shafts.
| White piedra | |
|---|---|
| Other names | Tinea blanca |
 | |
| Specialty | Infectious disease |
Signs and symptoms
editDiagnosis
editWhite piedra is caused by Trichosporon beigelii.[5][6] White piedra can occur on the hair of the scalp; Trichosporon ovoides is likely the cause in this case.[7] White piedra on scalp hair is rarely caused by Trichosporon inkin; pubic hair with white piedra is what T. inkin is mainly associated with.[8] White piedra can occur on pubic hair; T. inkin likely causes this.[7]
Trichosporon mucoides can also cause white piedra.[2] In such cases, a periodic acid-Schiff–diastase stain and fungal culture may aid in diagnosis.[2]
Treatment
editThere are several approaches to treat this infectious disease. One approach involves shaving the affected areas. Another approach involves the use of antifungal medication, such as ketaconazole shampoo.[2][9]
See also
editReferences
edit- ^ Pontes ZB, Ramos AL, Lima Ede O, Guerra Mde F, Oliveira NM, Santos JP (July 2002). "Clinical and mycological study of scalp white piedra in the State of Paraíba, Brazil" (PDF). Memórias do Instituto Oswaldo Cruz. 97 (5): 747–50. doi:10.1590/S0074-02762002000500028. PMID 12219146.
- ^ a b c d Bieber, Amy Kalowitz; Pomeranz, Miriam Keltz; Kim, Randie H. (2021-03-01). "White Piedra". JAMA Dermatology. 157 (3): 339. doi:10.1001/jamadermatol.2020.4266. ISSN 2168-6068. PMID 33471028.
- ^ Bonifaz, Alexandro; Tirado-Sánchez, Andrés; Araiza, Javier; Rodríguez-Leviz, Alejandra; Guzmán-Sánchez, Daniela; Gutiérrez-Mendoza, Selene; Castrejón, Laura (2018-12-13). "White Piedra: Clinical, Mycological, and Therapeutic Experience of Fourteen Cases". Skin Appendage Disorders. 5 (3): 135–141. doi:10.1159/000493374. ISSN 2296-9195. PMC 6489071. PMID 31049333.
- ^ Roshan, Anupama S.; Janaki, C; Parveen, B (2009). "White piedra in a mother and daughter". International Journal of Trichology. 1 (2): 140–141. doi:10.4103/0974-7753.58559. ISSN 0974-7753. PMC 2938578. PMID 20927238.
- ^ Tambe, Swagata A.; Dhurat, S. Rachita; Kumar, Chaya A.; Thakare, Preeti; Lade, Nitin; Jerajani, Hemangi; Mathur, Meenakshi (2009). "Two cases of scalp white piedra caused by Trichosporon ovoides". Indian Journal of Dermatology, Venereology and Leprology. 75 (3): 293–295. doi:10.4103/0378-6323.51256. ISSN 0973-3922. PMID 19439885.
- ^ Jain, Suresh Kumar; Singh, Arti; Nyati, Asha; Mohta, Alpana; Kushwaha, Ramesh Kumar (2019). "A case of scalp white piedra caused by trichosporon ovoides". International Journal of Trichology. 11 (3): 134–137. doi:10.4103/ijt.ijt_19_19. ISSN 0974-7753. PMC 6580808. PMID 31360044.
- ^ a b Hay, Roderick J. (2015). "Dermatophytosis (Ringworm) and Other Superficial Mycoses". Mandell, Douglas, and Bennett's Principles and Practice of Infectious Diseases. pp. 2985–2994.e1. doi:10.1016/B978-1-4557-4801-3.00268-X. ISBN 9781455748013.
- ^ Kriplani, Dimple; Patel, Bharti; Viswanath, Vishalakshi; Miskeen, Autarkishen; Torsekar, Raghunandangovind (2011). "White piedra of scalp hair by Trichosporon inkin". Indian Journal of Dermatology, Venereology and Leprology. 77 (5): 591–3. doi:10.4103/0378-6323.84065. PMID 21860159.
- ^ Kiken DA, Sekaran A, Antaya RJ, Davis A, Imaeda S, Silverberg NB (December 2006). "White piedra in children". Journal of the American Academy of Dermatology. 55 (6): 956–61. doi:10.1016/j.jaad.2005.11.1033. PMID 17097391.