Acute infantile liver failure associated with fever, syndrome of
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(ILFS1, ILFS2, ILFS3)
Prevalence; 1/1.106. Initially described in the Irish Traveller population. Recurrent episodes of acute liver failure during febrile episodes.
Autosomal recessive transmission.
Three forms have been identified:
- ILFS1: mutation of the LARS1 gene (5q32) [MIM 615 438] coding for leucyl-tRNA synthase I, which plays a role in the interaction between glucose levels and leucine metabolism. Intrauterine growth retardation, microcytic anemia, hypotonia, convulsions and developmental delay.
- ILFS2: mutation of the NABS gene (2p24.3) (neuroblastoma amplified sequence) [MIM 616 483]. The NBAS gene is co-expressed in excess with the MYC gene in neuroblastoma. The NBAS-coded protein is a component of the synthaxin 18 complex that is a key component of retrograde vesicular transport from Golgi's bodies to the endoplasmic reticulum. This complex is heat-sensitive, which may explain the pathophysiology of the disease. Special phenotype: retrognathia, clinodactyly of the fifth finger, brachydactyly of the toes III and V, diffuse osteopenia, vormian bones or bony structures in the cranial sutures.
- ILFS3: mutation of the RINT1 gene (7q22.3); in addition: short stature, vertebral abnormalities (hypoplasia, platyspondylia) and dysplasia of the femoral heads [MIM 618 641].
Onset before 2 years of age. Recurrent episodes of acute liver failure occurring during febrile episodes: vomiting, apathy, hypoglycemia, hepatic encephalopathy, sometimes coma, hepatomegaly. Liver function returns to normal between these episodes. The symptomatology usually disappear after 4 years of age.
On biopsy: hepatic steatosis, localized fibrosis.
Treatment: symptomatic for acute liver failure, sometimes liver transplantation.
Anesthetic implications:
check the liver enzymes and hepatic function; aggressive treatment of any febrile episode
References :
Updated January 2025