raremaprare-disease reference indexOrphadata 2026-06-23 · HPO 2026-09-01
ORPHA:615

Familial atrial myxoma

Type
Disease
Group
Disorder
Inheritance
Autosomal dominant
Age of onset
Adolescent, Adult
Status
active

A rare, genetic cardiac tumor characterized by the presence of a primary, benign, gelatinous mass located in the atria and composed of primitive connective tissue cells and stroma (resembling mesenchyme) in several members of a family. Clinical presentation depends on the size, mobility and location of tumor, ranging from nonspecific and/or constitutional symptoms to sudden cardiac death, and includes dyspnea, hemoptisis, syncope, fatigue, fever, cutaneous rash, increases in venous pressure and/or peripheral edema.

1

Names in Orphadata languages

12 of 12 languages
LangNameSynonyms
enFamilial atrial myxoma
frMyxome auriculaire
deMyxom, atriales familiäres
esMixoma auricular familiar
itMixoma atriale familiare
nlFamiliaal atriummyxoom
ptMixoma auricular familiar
plRodzinny śluzak przedsionka
csFamiliární atriální myxom
ukСімейна міксома передсердь
zh家族性心房粘液瘤
trAilesel atriyal miksoma

Definition in:

2

Cross-references

qualifier = Orphanet mapping relation
SourceCodeQualifierICD relationValidation
OMIM255960Evalidated
ICD-10D15.1NTBTattributedvalidated
ICD-112F01NTBTindexvalidated
MONDO0009719Evalidated
MeSHC538262Evalidated
UMLSC1850635Evalidated
GARD139Evalidated

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 (3):

No children.

4

Genes

1 direct
GeneAssociationStatusHGNCEnsemblOMIMLocusNameSource of validation
PRKAR1ADisease-causing germline mutation(s) inAssessedHGNC:9388ENSG0000010894618883017q24.2protein kinase cAMP-dependent type I regulatory subunit alpha10973256[PMID]
5

Prevalence and incidence

2 records
TypeClassValueAreaQualificationValidationSource
Cases/families17 familiesWorldwideFamily(ies)Validated1540058[PMID]
Point prevalence<1 / 1 000 000—WorldwideClass onlyValidatedORPHANET_1540058[PMID]

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

18 annotations · validated 2017-07-12
HPOTerm (as annotated by Orphanet)Diagnostic
Obligate (100%)
HP:0011672Cardiac myxoma
Very frequent (99-80%)
HP:0030148Heart murmur
HP:0006691Pulmonic valve myxoma
Frequent (79-30%)
HP:0003388Easy fatigability
HP:0002875Exertional dyspnea
Occasional (29-5%)
HP:0001541Ascites
HP:0006689Bacterial endocarditis
HP:0001640Cardiomegaly
HP:0100749Chest pain
HP:0001396Cholestasis
HP:0001635Congestive heart failure
HP:0001945Fever
HP:0000952Jaundice
HP:0010741Pedal edema
HP:0001907Thromboembolism
HP:0005180Tricuspid regurgitation
Very rare (<4-1%)
HP:0002617Dilatation
HP:0004944Dilatation of the cerebral artery

Run the differential on the 3 obligate / very frequent terms

Annotation source: 9066386[PMID]_1540058[PMID]_686891[PMID]_1180432[PMID]_5115867[PMID]_4725591[PMID]

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Sources for this card