Pityriasis alba

Jump to navigation Jump to search
Pityriasis alba
ICD-10 L30.5
ICD-9 696.5
DiseasesDB 31121
eMedicine ped/1813  derm/333 emerg/425

WikiDoc Resources for Pityriasis alba


Most recent articles on Pityriasis alba

Most cited articles on Pityriasis alba

Review articles on Pityriasis alba

Articles on Pityriasis alba in N Eng J Med, Lancet, BMJ


Powerpoint slides on Pityriasis alba

Images of Pityriasis alba

Photos of Pityriasis alba

Podcasts & MP3s on Pityriasis alba

Videos on Pityriasis alba

Evidence Based Medicine

Cochrane Collaboration on Pityriasis alba

Bandolier on Pityriasis alba

TRIP on Pityriasis alba

Clinical Trials

Ongoing Trials on Pityriasis alba at Clinical Trials.gov

Trial results on Pityriasis alba

Clinical Trials on Pityriasis alba at Google

Guidelines / Policies / Govt

US National Guidelines Clearinghouse on Pityriasis alba

NICE Guidance on Pityriasis alba


FDA on Pityriasis alba

CDC on Pityriasis alba


Books on Pityriasis alba


Pityriasis alba in the news

Be alerted to news on Pityriasis alba

News trends on Pityriasis alba


Blogs on Pityriasis alba


Definitions of Pityriasis alba

Patient Resources / Community

Patient resources on Pityriasis alba

Discussion groups on Pityriasis alba

Patient Handouts on Pityriasis alba

Directions to Hospitals Treating Pityriasis alba

Risk calculators and risk factors for Pityriasis alba

Healthcare Provider Resources

Symptoms of Pityriasis alba

Causes & Risk Factors for Pityriasis alba

Diagnostic studies for Pityriasis alba

Treatment of Pityriasis alba

Continuing Medical Education (CME)

CME Programs on Pityriasis alba


Pityriasis alba en Espanol

Pityriasis alba en Francais


Pityriasis alba in the Marketplace

Patents on Pityriasis alba

Experimental / Informatics

List of terms related to Pityriasis alba

Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1]; Associate Editor(s)-in-Chief: Kiran Singh, M.D. [2]


Pityriasis alba is a common skin condition mostly occurring in children and usually seen as dry, fine scaled, pale patches on their faces. It is self limiting and usually only requires use of moisturiser creams.

The condition is so named for the fine scaly appearance initially present (pityriasis) and the palor of the patches that develop (whilst "alba" is Latin for white, the patches in this condition are not totally depigmented)[1].


There is no specific known cause for this condition, but any dermatitis inflammation of the skin may heal leaving pale skin, as may excessive use of corticosteroid creams used to treat episodes of eczema. The hypopigmentation is due to both reduced activity of melanocytes with fewer and smaller melanosomes.[2]

The condition is most often seen in children between the ages of 3 and 16 years and is more common in males than females.[3] It possibly occurs more frequently in those of light-skin, but is more apparent in those of darker complexion.[4]

Up to a third of US school children may at some stage get this condition. Single point prevalence studies from India have shown variable rates from 8.4%,[5] to 31%.[6] Other studies have shown prevalence rates in Brazil of 9.9%,[7] Egypt 13.49%,[8] Romania 5.1%,[9] Turkey 12% where higher rates were seen in those with poor socioeconomic conditions,[10] and just 1% in school children in Hong Kong.[11]

Symptoms and signs

The dry scaling appearance is most noticeable during the winter as a result of dry air inside people's homes. During the summer, tanning of the surrounding normal skin makes the pale patches of pityriasis alba more prominent.

Individual lesions develop through 3 stages and sometimes are itchy:

  1. Raised and red - although the redness is often mild and not noticed by parents
  2. Raised and pale
  3. Smooth flat pale patches

Lesions are round or oval, of 0.5-2 cm in size although may be larger if they occur on the body (up to 4cm), and usually number from 4 or 5 to over 20. The patches are dry with very fine scales. They most commonly occur on the face (cheeks), but in 20% appear also on the upper arms, neck, or shoulders.


Physical Examination




No treatment is required and the patches in time will settle.[13] The redness, scale and itch if present may be managed with simple emollients and sometimes hydrocortisone, a weak steroid, is also used.[14]

As the patches of pityriasis alba do not darken normally in sunlight, effective sun protection helps minimise the discrepancy in colouration against the surrounding normal skin. Cosmetic camouflage may be required.

Tacrolimus has been reported as speeding resolution.[15]

In exceptionally severe cases PUVA therapy may be considered.[16]


The patches of PA may last from 1 month to 10 years, but commonly on the face last a year or more.

See also

  • Vitiligo which, by comparison, causes total loss of skin colour and on the face tends to occur around the mouth.[1]


  1. 1.0 1.1 Pinto FJ, Bolognia JL (1991). "Disorders of hypopigmentation in children". Pediatr. Clin. North Am. 38 (4): 991–1017. PMID 1870914.
  2. Vargas-Ocampo F (1993). "Pityriasis alba: a histologic study". Int. J. Dermatol. 32 (12): 870–3. PMID 8125687.
  3. Blessmann Weber M, Sponchiado de Avila LG, Albaneze R, Magalhães de Oliveira OL, Sudhaus BD, Cestari TF (2002). "Pityriasis alba: a study of pathogenic factors". Journal of the European Academy of Dermatology and Venereology : JEADV. 16 (5): 463–8. PMID 12428838.
  4. Laude TA (1995). "Approach to dermatologic disorders in black children". Seminars in dermatology. 14 (1): 15–20. PMID 7742234.
  5. Dogra S, Kumar B (2003). "Epidemiology of skin diseases in school children: a study from northern India". Pediatric dermatology. 20 (6): 470–3. PMID 14651562.
  6. Faye O, N'Diaye HT, Keita S, Traoré AK, Hay RJ, Mahé A (2005). "High prevalence of non-leprotic hypochromic patches among children in a rural area of Mali, West Africa". Leprosy review. 76 (2): 144–6. PMID 16038247.
  7. Bechelli LM, Haddad N, Pimenta WP, Pagnano PM, Melchior E, Fregnan RC, Zanin LC, Arenas A (1981). "Epidemiological survey of skin diseases in schoolchildren living in the Purus Valley (Acre State, Amazonia, Brazil)". Dermatologica. 163 (1): 78–93. PMID 7274519.
  8. Abdel-Hafez K, Abdel-Aty MA, Hofny ER (2003). "Prevalence of skin diseases in rural areas of Assiut Governorate, Upper Egypt". Int. J. Dermatol. 42 (11): 887–92. PMID 14636205.
  9. Popescu R, Popescu CM, Williams HC, Forsea D (1999). "The prevalence of skin conditions in Romanian school children". Br. J. Dermatol. 140 (5): 891–6. PMID 10354028.
  10. Inanir I, Sahin MT, Gündüz K, Dinç G, Türel A, Oztürkcan S (2002). "Prevalence of skin conditions in primary school children in Turkey: differences based on socioeconomic factors". Pediatric dermatology. 19 (4): 307–11. PMID 12220273.
  11. Fung WK, Lo KK (2000). "Prevalence of skin disease among school children and adolescents in a Student Health Service Center in Hong Kong". Pediatric dermatology. 17 (6): 440–6. PMID 11123774.
  12. 12.0 12.1 "Dermatology Atlas".
  13. Lin RL, Janniger CK (2005). "Pityriasis alba". Cutis; cutaneous medicine for the practitioner. 76 (1): 21–4. PMID 16144284.
  14. Harper J (1988). "Topical corticosteroids for skin disorders in infants and children". Drugs. 36 Suppl 5: 34–7. PMID 2978289.
  15. Rigopoulos D, Gregoriou S, Charissi C, Kontochristopoulos G, Kalogeromitros D, Georgala S (2006). "Tacrolimus ointment 0.1% in pityriasis alba: an open-label, randomized, placebo-controlled study". Br. J. Dermatol. 155 (1): 152–5. PMID 16792767.
  16. Di Lernia V, Ricci C (2005). "Progressive and extensive hypomelanosis and extensive pityriasis alba: same disease, different names?". Journal of the European Academy of Dermatology and Venereology : JEADV. 19 (3): 370–2. PMID 15857470.


Template:WikiDoc Sources