[Acute parapsoriasis in a 5-year-old girl]

Area of Science:

• Dermatology
• Pediatric Dermatology

Background:

• Acute parapsoriasis, specifically pityriasis lichenoides et varioliformis of Mucha-Habermann, is a rare dermatosis.
• Understanding its varied presentations in children is crucial for timely diagnosis.

Observation:

• A 5-year-old girl presented with unusual skin changes resembling pityriasis lichenoides et varioliformis of Mucha-Habermann.
• Lesions were polymorphic, including papules, necrotizing vesicles, and ulcerations, with some papules showing desquamation characteristic of pityriasis guttata.
• The lesions were primarily on the trunk, with lesser involvement of the face and extremities. The child maintained good general health.

Findings:

• The case highlights a rare pediatric presentation of pityriasis lichenoides et varioliformis of Mucha-Habermann.
• Characteristic polymorphic lesions, including papules, necrotizing vesicles, ulcerations, and desquamation, were observed.
• The long-term persistence of lesions and the child's good general condition were notable diagnostic factors.

Implications:

• This case expands the clinical spectrum of pityriasis lichenoides et varioliformis of Mucha-Habermann in pediatric dermatology.
• Early recognition of polymorphic skin lesions is essential for accurate diagnosis and management in children.
• Further research into potential triggers, such as environmental exposures like insecticides and detergents, may be warranted.