Abstract
INTRODUCTION: Pityriasis versicolor is a common epidermal mycotic infection, well known in its classic hypo- or hyperpigmented macular form. However, its atrophic variant, first described in 1971, remains rare and poorly documented. The underlying cause of this variant has yet to be determined. CASE PRESENTATION: We report 3 cases of patients treated with topical steroids for inflammatory skin diseases (atopic dermatitis, cutaneous scleroderma, and mycosis fungoides) who developed erythematous and squamous atrophic lesions on their back during follow-up. Complete resolution of both patches and atrophy was observed following the discontinuation of topical steroids and the onset of topical and systemic antifungal therapy. CONCLUSION: Atrophic pityriasis versicolor is a disease which deserves to be highlighted to prevent misdiagnosis with other severe dermatological conditions also presenting with skin atrophy, as to avoid lesions worsening due to inappropriate treatment.