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Pityriasis versicolor rubra.

Manubu Maeda¹, Koi Chi Makimura, Hideyo Yamaguchi

¹Department of Dermatology, Prefectural Gifu Hospital, 4-6-1 Noishiki, Gifu City, 500-8717, Japan.

European Journal of Dermatology : EJD

|March 2, 2002

Summary

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This study describes pityriasis versicolor (PV) rubra, a fungal skin infection often linked to collagen diseases. Effective anti-fungal treatment led to rapid lesion resolution and no recurrence in patients.

Area of Science:

Dermatology
Mycology
Infectious Diseases

Background:

Pityriasis versicolor (PV) is a superficial fungal infection.
Collagen diseases, such as systemic lupus erythematosus (SLE) and systemic scleroderma (SSc), were noted in five of six reported cases.
PV rubra and PV nigra were observed concurrently on the trunk in two SLE and one SSc case.

Observation:

Diagnosis was confirmed via KOH microscopy of skin scrapings and Sabouraud's agar cultures.
Malassezia sympodialis was isolated from lesions in one patient.
Histopathology revealed dilated dermal blood vessels but no epidermal hyperplasia or dermal inflammation.

Findings:

Clinical and histological findings supported the diagnosis of PV rubra.
Yeast-like and filamentous structures were identified in the stratum corneum.

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All patients responded well to topical anti-fungal treatment, with lesions clearing within two weeks.

Implications:

PV rubra may be a distinct entity from PV nigra.
Prompt treatment with anti-fungal ointments is effective for PV rubra.
Further research may clarify the relationship between PV rubra and PV nigra.