ABSTRACT
Objetivo: evaluar la distribución por frecuencia de las enfermedades hepáticas que justificaron el estudio por biopsia en pacientes pediátricos colombianos. Metodología: se evaluaron las biopsias de hígado realizadas durante 5 años en un hospital pediátrico y se agruparon las enfermedades hepáticas por diagnóstico y edad. Resultados: se encontraron 182 estudios histopatológicos de 168 pacientes, 14 de ellos contaban con 2 procedimientos; 53,6% fueron niños y 46,4%, niñas. El grupo de edad con más biopsias fue el de los lactantes menores y la colestasis fue en ellos la indicación más frecuente del estudio. Los grupos de enfermedades más diagnosticadas fueron los procesos inflamatorios (30,2%), las anormalidades de la vía biliar (26,4%), las enfermedades tumorales (14,9%) y los trastornos metabólicos/de depósito (9,3%). Los porcentajes restantes correspondieron a entidades infrecuentes y biopsias normales. Conclusión: la biopsia hepática es una herramienta útil y práctica en el diagnóstico de la enfermedad hepática pediátrica cuando se combina con datos clínicos y de laboratorio. En nuestro estudio, los procesos inflamatorios, las anormalidades de la vía biliar y las enfermedades tumorales fueron las categorías más diagnosticadas.
Objective: The objective of this study was to evaluate the frequency and distribution of liver diseases justifying liver biopsies in Colombian pediatric patients. Methodology: Liver biopsies performed at a pediatric hospital over a period of 5 years were assessed and then sorted according to age groups and diagnoses. Results: A total of 182 histopathological studies of 168 patients (14 of whom had two procedures each.) were found: 53.6% were boys, and 46.4% were girls. Young infants were the age group which had the most biopsies, and cholestasis was the most frequent reason for these biopsies. Other diseases diagnosed included inflammatory processes (30.2%), abnormalities of the biliary tract (26.4%), tumor diseases (14.9%) and metabolic/storage disorders (9.3%). The remaining percentages were for rare entities and normal biopsies. Conclusion: Liver biopsies are useful and practical for the diagnosis of pediatric liver disease when combined with clinical and laboratory data. In our study, inflammatory processes, abnormalities of the biliary tract and tumor diseases were the most frequently diagnosed categories.
Subject(s)
Humans , Male , Female , Infant, Newborn , Infant , Child, Preschool , Child , Adolescent , Biopsy , Non-alcoholic Fatty Liver DiseaseABSTRACT
BACKGROUND AND AIMS: Although there is much known about liver diseases, some aspects remain unclear, such as the nature of the differences between the diseases observed in newborn infants and those in adults. For example, how do newborns respond to duct epithelial cell injury? Do the stellate cells in newborns respond similarly to those in adults during biliary obstruction? METHODS: Ninety newborn Wistar rats aged six days, weighing 8.0 - 13.9 g each, and 90 adult rats weighing 199.7 - 357.0 g each, were submitted to bile duct ligation. After surgery, they were randomly divided and sacrificed on the 3rd, 5th, 7th, 14th, 21st or 28th day post-bile duct ligation. Hepatic biopsies were obtained and immunohistochemical semi-quantification of desmin and á-SMA expression was performed in hepatic stellate cells and in myofibroblasts in the portal space, and between the portal space and the liver lobule. RESULTS: Desmin expression in the myofibroblast cells post-bile duct ligation was higher in young rats, reaching its peak level in a shorter time when compared to the adult animals. The differences between the groups for á-SMA expression were less significant than for desmin. CONCLUSIONS: These findings indicate that there is an increase in the number of collagen-producing myofibroblast cells in young animals, suggesting that there is more intense fibrosis in this population. This finding may explain why young animals with bile duct obstruction experience more intense portal fibrosis that is similar to the pathology observed in the livers of newborns with biliary atresia.