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Successful treatment of generalized eruptive histiocytoma with PUVA

Generalized eruptive histiocytoma (GEH) is a rare benign skin disease mainly affecting adults which belongs to the family of non‐Langerhans‐cell histiocytoses. A 32‐year‐old Caucasian woman developed disseminated, monomorphic papules of the trunk after a common cold with sinusitis. Mucous membranes, palms and soles were spared. She also suffered from arthralgia without fever or night sweats. After one month, the patient noticed progression of the reddish papules involving the trunk, extremities and face. Clinical as well as histological examination and immunohistochemistry led to the diagnosis of GEH. The clinical examination and laboratory testing were normal, except for eosinophilia in the peripheral blood and bone marrow. No neoplastic diseases were found during thorough examinations. Systemic PUVA therapy produced rapid regression of the skin lesions. After 10 treatments the lesions began to regress leaving slight papules and multiple brown hyperpigmentations. The lesions resolved completely after 20 PUVA treatments. No relapses occurred. Systemic PUVA therapy represents a promising option for the treatment of GEH.