Lúpus eritematoso na infância: estudo retrospectivo com ênfase em suas manifestações cutâneas, classificação e evolução / Childhood lupus erythematosus: retrospective study with emphasis on cutaneous findings, classification and evolution

AUTOR(ES)
DATA DE PUBLICAÇÃO

2008

RESUMO

Lupus erythematosus was not well studied in childhood, especially in its chronic cutaneous, subacute and bullous forms that are uncommon at this age group. The present work aims to study the various forms of childhood lupus erythematosus. We retrospectively studied through medical records patients with lupus erythematosus whose disease had started until 16 years of age who were followed at Dermatology Division of Hospital das Clínicas of University of São Paulo between 1991 and 2006. The patients included had the diagnosis established on clinical grounds and confirmed by histological examination of a specific lesion. We found 48 patients: 33 with discoid lesions, two with lupus profundus, four with subacute cutaneous lupus erythematosus, four with acute cutaneous lupus erythematosus without other specific lesion and five with bullous lupus erythematosus. We analyzed the clinical, laboratorial, histological and direct immunofluorescence findings. Nineteen cases fulfilled the criteria for systemic lupus erythematosus. There was a slight female predominance. Familiar history of lupus erythematosus was present in 10% of cases. Twenty four percent of children with discoid lesions fulfilled the criteria for systemic lupus erythematosus and 75% showed disseminated lesions. The most frequent clinical manifestations in systemic lupus erythematosus were cutaneous, articular and renal. Diffuse proliferative glomerulonephritis was the most frequent form of nephritis. Hematological involvement was bellow or in the bottom of normal limits reported in the literature. Neuropsychiatric disease occurred in 68% of patients. Cardiac, pulmonary and gastrointestinal involvement was not frequent. ANA was positive in 95% of cases and. anticardiolipin antibodies were present in 21%. Two of four subacute cutaneous lupus erythematosus patients fulfilled the criteria for systemic lupus erythematosus and had convulsions and nephritis; one of them was submitted to renal transplantation. All of them referred photosensitivity and anti-Ro was present in three of four cases. All patients with bullous lupus erythematosus fulfilled the criteria for systemic lupus erythematosus and presented renal involvement and low complement levels. None of the two patients with lupus profundus fulfilled the criteria for systemic lupus erythematosus. Both had disseminated lesions and typical histology. Histological examination was also characteristic in the other cases and IgM was the most frequent immunodeposit at direct immunofluorescence. PAS staining showed thickening of basement membrane in 37 of 40 cases studied. To conclude, childhood lupus erythematosus is similar to adult lupus erythematosus, however shows some peculiarities as lower female predominance, high proportion of familiar history of lupus erythematosus and greater association with systemic lupus erythematosus in children with discoid lesions. Children with subacute cutaneous lupus erythematosus and criteria for systemic lupus erythematosus had severe systemic involvement. Renal disease was frequent in children with bullous systemic lupus erythematosus

ASSUNTO(S)

estudos retrospectivos prognóstico prognosis lúpus eritematoso cutâneo child cutaneous lupus erythematosus criança retrospective studies

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