Une dermatophytie en “rosette”

Dermatophyties are diseases caused by keratinophilic fungi. We here report the case of a 8-year old vaccinated female child having extremely itchy vesicular-erosive lesions grouped in rosette-like pattern at the level of the tail of the left eyebrow (A), the nostrils, the extensor surfaces of the forearm and the upper part of the chest and back associated with hypochromic scars (B), without digestive symptoms since 3 months. Moreover skin appendage examination showed alopecia of the scalp(C) with shaved head. According to child’s mom this condition had started one year before and evolved since then. Skin lesions primarily evoked dermatitis herpetiformis, but the presence of patchy alopecia and the wish to avoid skin biopsy, which would have been an invasive procedure for the child, led clinicians to perform mycological examination which was in favor of hair and skin parasitism caused by Microsporum Canis. Treatment with topical and systemic griseofulvin at a dosage of 20 mg/kg/day for 6 weeks was established with very good clinical outcome. Dermatophyties are diseases caused by microscopic filamentous keratinophilic fungi. Clinically, skin lesions usually appear as single or multiple, rounded or polycyclic patches with extremely evocative erythematous scaly vesicular edge, centrifugal extension and central healing. The originality of our study lies in the atypical clinical presentation in "rosette pattern".