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Mitochondriopathies are a heterogeneous group of genetic disorders with a wide array of symptomatology, organ system involvement, and inheritance patterns. Neonatal presentation can be fatal with neuromuscular dysfunction, lactic acidosis and hepatic failure. Historic literature has numerous phenotypic illustrations; however, genotypic correlation is limited. With improved testing methods, genotype-phenotype correlation is now increasingly feasible as demonstrated herein. We present liver pathology findings in an infant who expired with a diagnostic suspicion of a mitochondrial disorder. Postmortem hepatocyte hypereosinophilia with microvesicular steatosis associated with ultrastructural findings of mitochondrial hyperplasia supported a mitochondriopathy. Genetic testing eventually confirmed mitochondrial complex I deficiency from bi-allelic mutations in . Morphologic attributes can assist in diagnosis of mitochondriopathies before specific genetic testing results are available. This case also highlights that diagnostic information can be gained from ultrastructural examination of postmortem liver tissue.
This article was published in the following journal.
Name: Fetal and pediatric pathology
is a powerful model to study mitochondrial respiratory chain defects, particularly succinate dehydrogenase (SDH) deficiency. Mutations in genes cause degenerative disorders and often lead to death. T...
Prenatal onset of mitochondrial disease has been described in two cases with recessive mutations in the sideroflexin 4 gene (SFXN4). We present a third case with complex I deficiency associated with n...
Previous investigations have implicated mitochondrial dysfunction characterized by Complex I deficiency in the death of dopaminergic neurons in Parkinson's disease (PD). To date, there are no efficien...
Bile salt export pump (BSEP) deficiency is an important reason for chronic cholestasis leading to liver transplantation (LT) in early childhood. The underlying pathology is a dysfunction of BSEP due t...
Alpha1-antitrypsin (AAT) deficiency predisposes individuals to emphysema and liver diseases such as cirrhosis and hepatocellular carcinoma. The deficiency results from mutations in the SERPIN1A gene e...
Patients with confirmed mitochondrial DNA depletion syndrome 2 (thymidine kinase 2 [TK2] deficiency) have reduced levels of nucleotides (deoxythymidine monophosphate and deoxycytidine mono...
The purpose of the study is to determine the effect of setmelanotide (RM-493) on weight and other factors in patients with pro-opiomelanocortin (POMC) deficiency obesity due to rare bi-all...
The purpose of this study is to draw blood from vessels near the liver in patients undergoing liver surgery. This will be performed in both patients with cancer in order to learn more abou...
Our central hypothesis is that oral CoQ10 is a safe and effective treatment for children with inborn errors of mitochondrial energy metabolism due to defects in specific respiratory chain ...
The main goal of this study is to identify mitochondrial mutations associated with presbycusis. Patients affected by severe presbycusis and normal hearing controls (according to ISO7029 no...
Deficiencies or mutations in the genes for the SARCOGLYCAN COMPLEX subunits. A variety of phenotypes are associated with these mutations including a subgroup of autosomal recessive limb girdle muscular dystrophies, cardiomyopathies, and respiratory deficiency.
A disease that results from a congenital defect in ELECTRON TRANSPORT COMPLEX IV. Defects in ELECTRON TRANSPORT COMPLEX IV can be caused by mutations in the SURF1, SCO2, COX10, or SCO1 genes. ELECTRON TRANSPORT COMPLEX IV deficiency caused by mutation in SURF1 manifests itself as LEIGH DISEASE; that caused by mutation in SCO2 as fatal infantile cardioencephalomyopathy; that caused by mutation in COX10 as tubulopathy and leukodystrophy; and that caused by mutation in SCO1 as early-onset hepatic failure and neurologic disorder. (from Online Mendelian Inheritance in Man, http://www.ncbi.nlm.nih.gov/Omim, MIM#220110, May 17, 2001)
Cytochromes of the c type that are found in eukaryotic MITOCHONDRIA. They serve as redox intermediates that accept electrons from MITOCHONDRIAL ELECTRON TRANSPORT COMPLEX III and transfer them to MITOCHONDRIAL ELECTRON TRANSPORT COMPLEX IV.
A subspecialty of pathology concerned with the molecular basis (e.g., mutations) of various diseases.
An inherited metabolic disorder caused by deficient enzyme activity in the PYRUVATE DEHYDROGENASE COMPLEX, resulting in deficiency of acetyl CoA and reduced synthesis of acetylcholine. Two clinical forms are recognized: neonatal and juvenile. The neonatal form is a relatively common cause of lactic acidosis in the first weeks of life and may also feature an erythematous rash. The juvenile form presents with lactic acidosis, alopecia, intermittent ATAXIA; SEIZURES; and an erythematous rash. (From J Inherit Metab Dis 1996;19(4):452-62) Autosomal recessive and X-linked forms are caused by mutations in the genes for the three different enzyme components of this multisubunit pyruvate dehydrogenase complex. One of the mutations at Xp22.2-p22.1 in the gene for the E1 alpha component of the complex leads to LEIGH DISEASE.
Hepatology is the study of liver, gallbladder, biliary tree, and pancreas, and diseases associated with them. This includes viral hepatitis, alcohol damage, cirrhosis and cancer. As modern lifestyles change, with alcoholism and cancer becoming more promi...
A diagnostic test is any kind of medical test performed to aid in the diagnosis or detection of disease. For example: to diagnose diseases to measure the progress or recovery from disease to confirm that a person is free from disease Clin...
Pediatrics is the general medicine of childhood. Because of the developmental processes (psychological and physical) of childhood, the involvement of parents, and the social management of conditions at home and at school, pediatrics is a specialty. With ...