Ataxia, and Anorexia

Hypermethioninemia due to methionine adenosyltransferase deficiency is a very rare metabolic disorder resulting in isolated hepatic hypermethioninemia that is usually benign due to partial inactivation of enzyme activity. Rarely patients have been found to have an odd odor or neurological disorders such as brain demyelination.

BRAIN DEMYELINATION DUE TO METHIONINE ADENOSYLTRANSFERASE DEFICIENCY Is also known as mat deficiency|mat i/iii deficiency|hypermethioninemia, isolated persistent|methionine adenosyltransferase deficiency

• Intellectual disability
• Growth delay
• Nystagmus
• Cognitive impairment
• Hyperreflexia

SOURCES: OMIM ORPHANET MENDELIAN

Classic Hodgkin lymphoma is a lymph node cancer of germinal center B-cell origin. Hodgkin lymphoma tumors consist of a minority of malignant cells, known as 'Reed-Sternberg' (RS) cells, mixed with reactive lymphocytes and other benign inflammatory cells. A defining feature of RS cells is the presence of 2 nuclei (summary by Salipante et al., 2009).

LYMPHOMA, HODGKIN, CLASSIC; CHL Is also known as hodgkin disease

• Ataxia
• Neoplasm
• Peripheral neuropathy
• Hepatomegaly
• Fever

SOURCES: OMIM ORPHANET MENDELIAN

Holocarboxylase synthetase (HCS) deficiency is a life-threatening early-onset form of multiple carboxylase deficiency (see this term), an inborn error of biotin metabolism, that, if untreated, is characterized by vomiting, tachypnea, irritability, lethargy, exfoliative dermatitis, and seizures that can worsen to coma.

HOLOCARBOXYLASE SYNTHETASE DEFICIENCY Is also known as multiple carboxylase deficiency, neonatal form|hlcs deficiency|neonatal multiple carboxylase deficiency|multiple carboxylase deficiency, early onset|early-onset multiple carboxylase deficiency

• Seizures
• Global developmental delay
• Generalized hypotonia
• Ataxia
• Growth delay

SOURCES: ORPHANET OMIM MESH MENDELIAN

Arginase deficiency is a rare autosomal recessive amino acid metabolism disorder characterized clinically by variable degrees of hyperammonemia, developing from about 3 years of age, and leading to progressive loss of developmental milestones and spasticity in the absence of treatment.

ARGININEMIA Is also known as arg1 deficiency|arginase deficiency|hyperargininemia

• Intellectual disability
• Seizures
• Global developmental delay
• Generalized hypotonia
• Microcephaly

SOURCES: ORPHANET OMIM MESH MENDELIAN

• Intellectual disability
• Seizures
• Global developmental delay
• Generalized hypotonia
• Hearing impairment

SOURCES: OMIM MENDELIAN

Combined methylmalonic aciduria (MMA) and homocystinuria is a genetically heterogeneous disorder of cobalamin (cbl; vitamin B12) metabolism. The defect causes decreased levels of the coenzymes adenosylcobalamin (AdoCbl) and methylcobalamin (MeCbl), which results in decreased activity of the respective enzymes methylmalonyl-CoA mutase (MUT ) and methyltetrahydrofolate:homocysteine methyltransferase, also known as methionine synthase (MTR ). Different forms of the disorder have been classified according to complementation groups of cells in vitro: cblC (MAHCC ), cblD, cblF (MAHCF ), and cblJ (MAHCJ ).Isolated methylmalonic acidurias have also been classified by complementation groups: MMA 'mut' (OMIM ), caused by mutation in the MUT gene on chromosome 6p21; MMA cblA (OMIM ), caused by mutation in the MMAA gene (OMIM ) on 4q31; and MMA cblB (OMIM ), caused by mutation in the MMAB gene (OMIM ) on 12q24. Another form of isolated MMA (OMIM ) can be caused by defect in the transcobalamin receptor (CD320 ).

METHYLCOBALAMIN DEFICIENCY TYPE CBLDV1 Is also known as methylmalonic acidemia, cblh type, formerly|functional methionine synthase deficiency type cbldv1|methylmalonic aciduria, cblh type, formerly|methylmalonic acidemia and homocystinuria, cbld type

• Intellectual disability
• Seizures
• Global developmental delay
• Generalized hypotonia
• Ataxia

SOURCES: ORPHANET MESH OMIM MENDELIAN

Legionnaire disease (LD) is a type of pneumonia caused by Legionella pneumophila, a flagellated gram-negative bacterium found primarily in warm water environments. The disease and the bacterium were discovered following an outbreak traced to a 1976 American Legion convention in Philadelphia. A number of risk factors for acquiring LD have been identified, including age, smoking, chronic lung disease, cancer, and immunosuppression (summary by Hawn et al., 2003).

• Ataxia
• Neoplasm
• Muscle weakness
• Pain
• Peripheral neuropathy

SOURCES: ORPHANET OMIM MENDELIAN

Hereditary folate malabsorption (HFM) is an inherited disorder of folate transport characterized by a systemic and central nervous system (CNS) folate deficiency manifesting as megaloblastic anemia, failure to thrive, diarrhea and/or oral mucositis, immunologic dysfunction and neurological disorders.

HEREDITARY FOLATE MALABSORPTION Is also known as congenital folate malabsorption

• Intellectual disability
• Seizures
• Global developmental delay
• Generalized hypotonia
• Ataxia

SOURCES: MESH ORPHANET OMIM MENDELIAN

• Short stature
• Ataxia
• Failure to thrive
• Visual impairment
• Hepatomegaly

SOURCES: MESH ORPHANET OMIM MENDELIAN

Thiamine-responsive megaloblastic anemia (TRMA) is characterized by a triad of megaloblastic anemia, non-type I diabetes mellitus, and sensorineural deafness.

THIAMINE-RESPONSIVE MEGALOBLASTIC ANEMIA SYNDROME Is also known as thmd1|trma|thiamine-responsive megaloblastic anemia with diabetes mellitus and sensorineural deafness|rogers syndrome|thiamine-responsive myelodysplasia|thiamine metabolism dysfunction syndrome 1 (megaloblastic anemia, diabetes mellitus, and deafness type

• Seizures
• Global developmental delay
• Short stature
• Hearing impairment
• Microcephaly

SOURCES: MESH ORPHANET OMIM MENDELIAN