Hydroa vacciniforme

Hydroa Vacciniforme is a rare, chronic photodermatosis that primarily affects children and young adults. It is characterized by recurrent vesicles that heal with vacciniform scarring. The condition is often associated with systemic symptoms such as malaise and fever.

Etiology

The exact cause of Hydroa Vacciniforme is unknown. However, it is believed to be related to an abnormal response to UV radiation. Some studies have also suggested a possible link with Epstein-Barr virus (EBV) infection.

Clinical Presentation

Patients with Hydroa Vacciniforme typically present with recurrent episodes of vesicles, papules, and crusts on sun-exposed areas. These lesions heal with vacciniform (smallpox vaccine-like) scarring. Systemic symptoms such as malaise and fever may also be present.

Diagnosis

Diagnosis of Hydroa Vacciniforme is primarily based on clinical findings. Dermoscopic examination may show a characteristic pattern of yellowish-white areas surrounded by a reddish halo. Skin biopsy may reveal changes consistent with a photodermatosis.

Treatment

Treatment of Hydroa Vacciniforme is primarily aimed at reducing sun exposure. This can be achieved through the use of sun-protective clothing and broad-spectrum sunscreens. In severe cases, systemic treatments such as antimalarial drugs or immunosuppressive therapy may be required.

Prognosis

The prognosis of Hydroa Vacciniforme is generally good, although the condition can be chronic and recurrent. In rare cases, it may progress to a cutaneous T-cell lymphoma.

See Also

• Photodermatoses
• Epstein-Barr virus
• Cutaneous T-cell lymphoma

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  Hydroa vacciniforme