Autoimmune hepatitis type 1 in children : laboratorial features associated with histology and outcome / Hepatite autoimune tipo 1 em crianças: fatores laboratoriais associados com a resposta histológica e evolução da doença


IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia




INTRODUCTION: The study of factors that can recognize, earlier, which patients will be carrying autoimmune hepatitis presenting good outcome or those who will be resistant to treatment, would lead to a much better therapy planning. This study aims to: determine whether pretreatment laboratory factors and the time required for achieving clinical and laboratory remission are predictors of histological remission or improvement of the architectural degree in AIH type 1 in children. METHODS: A retrospective study of 50 children with autoimmune hepatitis type 1 accompanied by the Pediatric Hepatology Unit of the Institute of Children HC- FMUSP between 1992 and 2012. A review of 93 liver biopsies was randomly conducted by a single pathologist. RESULTS: Forty children were selected according to criteria of inclusion. In the initial biopsy the inflammatory activity level 4 and cirrhosis were predominant (31 patients-77, 5%), in the control biopsy 17 patients achieved histological remission and 11 presented improvement in the architectural degree. We found no statistical values of the diagnostic laboratory factors in relation to histological remission. Regarding the architecture, the exams total bilirubin (p = 0.02) and direct bilirubin (p = 0.04) and prothrombin time (p = 0.07) were related with the improvement of the architectural level when presented the values with lower changes. The time required for achieving clinical and laboratory remission presented no correlation with the improvement of the inflammatory or architectural pattern. The treatment was suspended in 14 children with relapse rate of 50%, in most of them the inflammatory activity still present on histology. The length of treatment was longer in children who developed sustained remission after the withdrawal of medication. CONCLUSIONS: We observed in our study that the laboratory factors for the diagnosis, regardless their degree of alteration, can not predict which children will progress to histological remission. The children who presented lower degrees of change in total and direct bilirubin and prothrombin time are those who have progressed to reversal of liver fibrosis. The time required for achieving clinical and laboratory remission was not a predictive factor for histological improvement. Relapse after discontinuation of treatment was associated to the presence of inflammatory activity, and patients with sustained remission are the ones who had longer period of treatment


autoimmune hepatitis children crianças hepatite auto-imune histologia histology resultado de tratamento treatment outcome

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