Case report. Erythrasmoid pityriasis versicolor.

Area of Science:

• Dermatology
• Mycology
• Infectious Diseases

Background:

• Pityriasis versicolor is a superficial fungal infection caused by Malassezia yeasts.
• Erythrasma is a superficial bacterial infection caused by Corynebacterium minutissimum.
• Both conditions can present with macules and patches, but typically have distinct clinical features.

Observation:

• A case study of a 50-year-old Caucasian male is presented.
• The patient exhibited pityriasis versicolor localized predominantly in the inguinal folds.
• The lesions were clinically indistinguishable from those typically seen in erythrasma.

Findings:

• The clinical presentation mimicked erythrasma, posing a diagnostic challenge.
• This specific presentation suggests a variant of pityriasis versicolor.
• The term 'erythrasmoid' is proposed for this clinical variant.

Implications:

• This classification may aid in differentiating similar-looking dermatological conditions.
• Further research is needed to understand the etiology and prevalence of this variant.
• Improved diagnostic criteria could enhance patient management for superficial skin infections.