Achromia Parasitaria

Pardo-Castello, V.

doi:10.1001/archderm.1932.01450020811001

Cited by 6 publications

(8 citation statements)

References 2 publications

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“…PVa can also occur without any hyperpigmented pre‐stage. Hypopigmentation and depigmentation as an independent variant of the disease, especially on black skin, have been described by Pardo‐Castello, 7 Jeliffe and Jacobson 8 and Marples 9 . Even though children are far less frequently affected by PV than adults, 72% of them show the hypopigmented or depigmented form 19 .…”

Section: Clinic Of Pityriasis Versicolor Albamentioning

confidence: 96%

“…In the older literature time course dependent presence of scaling is described. So there is marked scaling of early depigmented lesions, followed by complete regression during an intermediate stage in which desquamation is only demonstrable in the marginal region 7,24,26 …”

Section: Clinic Of Pityriasis Versicolor Albamentioning

confidence: 99%

“…As early as in 1935 Sulzberger assumed the presence of ‘an agent that actively removes skin pigment’ 31 Significantly delayed repigmentation of depigmented lesions despite no longer scaling; a fact that caused Barney in 1932 to assume destruction or ‘paralysation’ of pigment forming cells, as even the use of bergamot oil during UV irradiation failed to achieve repigmentation of white lesions within 3–6 weeks 7,23 Histologically and electron microscopically visible melanocytic damage with impaired melanogenesis. …”

Section: Histology and Electron Microscopy Of Pityriasis Versicolor Albamentioning

confidence: 99%

“…Significantly delayed repigmentation of depigmented lesions despite no longer scaling; a fact that caused Barney in 1932 to assume destruction or ‘paralysation’ of pigment forming cells, as even the use of bergamot oil during UV irradiation failed to achieve repigmentation of white lesions within 3–6 weeks 7,23 …”

Section: Histology and Electron Microscopy Of Pityriasis Versicolor Albamentioning

confidence: 99%

“…The hyperpigmented form shows bran‐like scaly yellowish‐red and brownish macules particularly in the seborrhoeic areas. Hypopigmentation and depigmentation have been differentiated from this hyperpigmented form as an independent variant and named as pityriasis versicolor alba (PVa) 7–9 . Numerous publications have dealt with the clinical picture of the hyperpigmented form.…”

Section: Introductionmentioning

confidence: 99%

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Pityriasis versicolor alba

Thoma¹,

Hj²,

Mayser³

2005

Acad Dermatol Venereol

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Pityriasis versicolor alba is a hypopigmented or depigmented variant of pityriasis versicolor characterized by maculous, partly pityriasiform, scaly depigmented lesions occurring particularly in seborrhoeic areas. Long-persisting hypopigmentation after healing of the pityriasis versicolor was first described by Gudden in 1853. Hypopigmentation and depigmentation were later differentiated as an independent variant of the disease. In 1848, Eichstedt recognized the pathogen-related character of pityriasis versicolor in its hyperpigmented form. Today it is generally accepted that the disease is caused by yeasts of the genus Malassezia, of which nine species are differentiated. It is controversial whether a single species is responsible for the disease. The pathogenesis of depigmentation has not been established. A screening effect by the scale layer as well as toxic effects on pigment synthesis by fungal metabolites have been discussed. With regard to the second mechanism, the newly discovered tryptophan-derived metabolites of M. furfur might be significant. Evidence-based data concerning the therapy of pityriasis versicolor alba do not exist. According to current recommendations, pityriasis versicolor should be rapidly treated with antimycotics, followed by ultraviolet therapy to induce maturation of existent melanosomes and accelerate repigmentation. However, depigmented lesions are difficult to improve by ultraviolet therapy.

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Section: Clinic Of Pityriasis Versicolor Albamentioning

confidence: 96%

Section: Clinic Of Pityriasis Versicolor Albamentioning

confidence: 99%