raremaprare-disease reference indexOrphadata 2026-06-23 · HPO 2026-09-01
ORPHA:2598

Mitochondrial myopathy and sideroblastic anemia

Synonyms: MLASA · Myopathy, lactic acidosis and sideroblastic anemia

Type
Disease
Group
Disorder
Inheritance
Autosomal recessive
Age of onset
Adolescent, Childhood, Infancy
Status
active

Mitochondrial myopathy and sideroblastic anemia belongs to the heterogeneous family of metabolic myopathies. It is characterised by progressive exercise intolerance manifesting in childhood, onset of sideroblastic anaemia around adolescence, lactic acidaemia, and mitochondrial myopathy.

1

Names in Orphadata languages

12 of 12 languages
LangNameSynonyms
enMitochondrial myopathy and sideroblastic anemiaMLASA · Myopathy, lactic acidosis and sideroblastic anemia
frMyopathie mitochondriale et anémie sidéroblastiqueMLASA · Myopathie, acidose lactique et anémie sidéroblastique
deMitochondriale Myopathie und sideroblastische AnämieMLASA · Myopathie mit Laktatazidose und sideroblastische Anämie
esMiopatía mitocondrial y anemia sideroblásticaMLASA · Miopatía, acidosis láctica y anemia sideroblástica
itMiopatia mitocondriale - anemia sideroblasticaMLASA · MSA · Miopatia - acidosi lattica - anemia sideroblastica
nlMitochondriale myopathie en sideroblastische anemieMLASA · Mitochondriale myopathie en sideroblastaire anemie · Myopathie, lactaatacidose en sideroblastische anemie · Myopathie, melkzuuracidose en sideroblastische anemie
ptMiopatia mitocondrial e anemia sideroblástica
plMiopatia mitochondrialna i anemia syderoblastycznaMiopatia, kwasica mleczanowa i niedokrwistość syderoblastyczna · MLASA · MSA
csMitochondriální myopatie a sideroblastická anémieMLASA · MSA · Myopatie, laktátová acidóza a sideroblastická anémie
ukМітохондріальна міопатія та сидеробластна анеміяMLASA · Міопатія, молочнокислий ацидоз та сидеробластна анемія
zh线粒体肌病伴铁粒幼细胞性贫血肌病,乳酸酸中毒与铁粒幼细胞性贫血
trMitokondriyal miyopati ve sideroblastik anemiMLASA · Miyopati, laktik asidoz ve sideroblastik anemi

Definition in:

2

Cross-references

qualifier = Orphanet mapping relation
SourceCodeQualifierICD relationValidation
OMIM500011BTNTvalidated
OMIM600462Evalidated
OMIM613561BTNTvalidated
ICD-10G71.3NTBTattributedvalidated
ICD-113A72.0YNTBTindexvalidated
MONDO0000863Evalidated
MeSHC536101Evalidated
UMLSC1838103Evalidated
GARD3885Evalidated

E exact · NTBT this ORPHAcode is narrower than the target · BTNT broader than the target · ND not decided.

3

Classification

Preferential parent (Orphanet linearisation):

Parents in the classifications (4):

No children.

4

Genes

2 direct
GeneAssociationStatusHGNCEnsemblOMIMLocusNameSource of validation
PUS1Disease-causing germline mutation(s) inAssessedHGNC:15508ENSG0000017719260810912q24.33pseudouridine synthase 121686963[PMID]
YARS2Disease-causing germline mutation(s) inAssessedHGNC:24249ENSG0000013913161095712p11.21tyrosyl-tRNA synthetase 220598274[PMID]_22504945[PMID]_24344687[PMID]_24430573[PMID]
5

Prevalence and incidence

2 records
TypeClassValueAreaQualificationValidationSource
Cases/families7 casesWorldwideCase(s)Validated15971356[PMID]
Point prevalence<1 / 1 000 000—WorldwideClass onlyValidatedORPHANET

Value is Orphadata's ValMoy: the mean estimate per 100 000 for prevalence and incidence, the number of cases or families for case reports.

6

HPO phenotypes

19 annotations · validated 2016-06-01
HPOTerm (as annotated by Orphanet)Diagnostic
Very frequent (99-80%)
HP:0001939Abnormality of metabolism/homeostasis
HP:0001903Anemia
HP:0009743Distichiasis
HP:0003457EMG abnormality
HP:0009055Generalized limb muscle atrophy
HP:0000218High palate
HP:0001252Hypotonia
HP:0003128Lactic acidosis
HP:0000343Long philtrum
HP:0000347Micrognathia
HP:0003737Mitochondrial myopathy
HP:0003198Myopathy
Frequent (79-30%)
HP:0000823Delayed puberty
HP:0000501Glaucoma
HP:0001249Intellectual disability
HP:0002808Kyphosis
HP:0000252Microcephaly
HP:0002650Scoliosis
HP:0003196Short nose

Run the differential on the 12 obligate / very frequent terms

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Sources for this card