Introduction:
Liver failure is observed in children if a child is given the wrong dosage of a medicine or taken in an excess amount in a short period. Some of the other reasons for acute liver failure are metabolic conditions (issues occurring with the physical and chemical processes inside the liver that are important and occur naturally), infections, or viruses.
What Is Liver Failure in Children?
Acute liver failure (ALF) is a condition in which the liver can no longer perform critical functions like creating proteins, removing toxins from the blood, and maintaining blood sugar levels. The liver is the largest organ and is inside the abdomen (belly). It has many crucial functions. Some of them are filtering toxic or harmful chemicals out of the blood, using medicines, and processing other foreign substances. The liver also aids in digesting food. It stores and releases energy and forms proteins to build the cells and tissues of the body and to allow the blood to form clots.
Liver failure is seen when the liver becomes incapable and deteriorates and stops working, either partially or completely. Although this is rarely seen, liver failure can even take place in children. Most of them have a good recovery rate, but others might become very ill, and some might even require a liver transplant to survive. There are primarily two types of liver failure seen in children:
- Acute Liver Failure: This is caused all of a sudden. It occurs in children with no known liver disease occurring priorly.
- Chronic Liver Failure: This is caused when a long-lasting liver disease becomes too bad, either slowly or all of a sudden.
What Is Acute Liver Failure in Children?
Acute liver failure (ALF) in children is a disease that affects the functioning of the liver. Acute liver failure occurs when most of the cells in the liver die in a short period, or the liver gets damaged. Pediatric liver failure is not as frequently observed as liver failure in adults, and liver failure in children is sporadic. It can be differentiated from that observed in adults in the etiologic and clinical forms. Children, especially those who are very small, do not show ideal features of encephalopathy, and the ALF can be defined in a revised way to include patients with advanced coagulopathy, regardless of mental status. In this case, a certain number of children will be required for a transplant, or the condition turns fatal.
What Is the Etiology ofAcute Liver Failure in Children?
Acute liver failure in children can be associated with infection, metabolic disorders like metabolic liver disease, drugs or medications, and dysregulation of the immune system. Around 50 percent of the acute liver failure cases in children have no known etiology, as per various studies.
Some of the known causes of acute liver failure in infants are:
- Infections: Herpes simplex, echovirus, adenovirus, hepatitis B, and parvovirus.
- Drugs or Toxins: Acetaminophen is a known cause of this disease.
- Cardiovascular Issues: Extracorporeal membrane oxygenation, hypoplastic left heart syndrome, shock, asphyxia, myocarditis, and more.
- Metabolic Disorders: Galactosemia (it is a hereditary disorder of metabolism of carbohydrates that affects the body's potential to transform galactose to glucose), tyrosinemia (a genetic disorder identified by problems related to the break down of the amino acid tyrosine), iron storage, mitochondrial condition, hereditary fructose intolerance (HFI), and fatty acid oxidation.
Some of the known causes of acute liver failure in toddlers and older children are:
- Infections: Certain infections like hepatitis A, B, and D, NANB (non-A non-B hepatitis) hepatitis, Epstein-Barr virus, cytomegalovirus, herpes, and more.
- Drugs or Toxins: Drugs like Valproic acid, Isoniazid, Halothane, Acetaminophen, mushroom, phosphorous, and Aspirin are responsible for this disease.
- Cardiovascular Issues: Myocarditis (inflammation of the layer of the heart ), heart surgery, cardiomyopathy, Budd-Chiari syndrome.
- Metabolic Disorders: Fatty acid oxidation, Reye's syndrome (a rarely seen serious condition that results in swelling in the liver and brain), leukemia.
- Immune-related Conditions: Autoimmune hepatitis, immune dysregulation, immune deficiency, hemophagocytic lymphohistiocytosis (HLH).
In adults, around 50 percent of cases are observed because of the overdose of the drug Acetaminophen, it can be intended or unintended, with hepatitis B and non-acetaminophen drug-induced liver injury takes place playing an important role. In children, Acetaminophen overdose has less than 20 percent of cases. However, metabolic disease, autoimmune disease, and infectious hepatitis, due primarily to herpes viruses seen in infants, are the more frequently diagnosed conditions. However, the condition remains undiagnosed in around 50 percent of children.
How to Diagnose Acute Liver Failure in Children?
The ways incorporated to diagnose an acute liver failure in children are reviewing their medical history, conducting a physical exam, and performing certain tests to diagnose acute liver failure using tests like:
- Blood Tests: A sample of blood is extracted from the concerned patient and is sent for examination of infections, drug overdoses, etc.
- Liver Biopsy: In this test, the surgeon passes a tiny needle via the skin and between the ribs of the child, under general anesthesia, to reach the liver and extract a small piece of tissue from the liver. It is further sent to a board-certified pediatric pathologist to check the tissue under a microscope to identify signs of liver failure.
How to Treat Acute Liver Failure in Children?
The treatment for acute liver failure relies on the cause of the issues. Certain causes can be managed by medicines only; some require intensive care unit expertise, which is critical for treating liver failure. However, the treatment given in the majority of the cases is supportive and includes managing low blood sugar, bleeding, brain swelling, and fluid overload. Liver transplantation might be mandatory for children whose liver function is deteriorating and keeps on getting worse.
Conclusion:
Acute liver failure (ALF) is a condition observed when many cells of the liver die or become too damaged in a short span of time. This results in the liver to fail to work the way it should. In children, acute liver failure is observed because of medication overdose, infections, cardiovascular issues, and metabolic disorders. These can be diagnosed by performing blood tests and liver biopsy. The management of acute liver failure in children can be done by medications, supportive care, or by transplanting the liver in a severe case.
