raremaprare-disease reference indexOrphadata 2026-06-23 · HPO 2026-09-01
ORPHA:508542

Congenital progressive bone marrow failure-B-cell immunodeficiency-skeletal dysplasia syndrome

Synonyms: MYSM1 deficiency

Type
Disease
Group
Disorder
Inheritance
Autosomal recessive
Age of onset
Neonatal
Status
active

A rare multiple congenital anomalies/dysmorphic syndrome characterized by early-onset progressive bone marrow failure with anemia, leukopenia, mild thrombopenia, and myelodysplastic features, as well as non-hematologic manifestations, such as developmental delay, cataracts, facial dysmorphism, short stature, and skeletal anomalies. Immunodeficiency primarily affects B-cells and may lead to increased susceptibility to infections. Additional reported features include dry skin and eczema, cardiac anomalies, hearing loss, and reduction of cerebral volume on brain imaging.

1

Names in Orphadata languages

12 of 12 languages
LangNameSynonyms
enCongenital progressive bone marrow failure-B-cell immunodeficiency-skeletal dysplasia syndromeMYSM1 deficiency
frSyndrome de pancytopénie progressive congénitale-déficit immunitaire en cellules B-dysplasie squelettiqueDéficit en MYSM1
deKongenitales progressives Knochenmarkversagen-B-Zell-Immundefekt-Skelettdysplasie-SyndromMYSM1-Defizienz · MYSM1-Mangel
esSíndrome congénito de insuficiencia medular progresiva-inmunodeficiencia de células B-displasia esqueléticaDeficiencia de MYSM1
itSindrome insufficienza midollare congenita progressiva-immunodeficienza delle cellule B-displasia scheletricaDeficit di MYSM1
nlCongenitaal progressief beenmergfalen - B-cel-immuundeficiëntie - skeletdysplasie-syndroomMYSM1-deficiëntie
ptSíndrome de falência progressiva da medula óssea-imunodeficiência células B-displasia esquelética
plZespół wrodzonej postępującej niewydolności szpiku kostnego- niedoboru odporności związanej z limfocytami B-dysplazji szkieletowejNiedobór MYSM1
csSyndrom zahrnující vrozené progresivní selhání kostní dřeně, imunodeficienci B buněk a skeletální dyspláziiDeficit MYSM1
ukВроджена прогресуюча недостатність кісткового мозку-В-клітинний імунодефіцит-скелетна дисплазіяДефіцит MYSM1
zh先天性进行性骨髓衰竭-B细胞免疫缺陷-骨骼发育不良综合征MYSM1缺乏
trDoğumsal ilerleyici kemik iliği yetmezliği-B hücre immün yetmezliği-iskelet displazisi sendromuMYSM1 eksikliği

Definition in:

2

Cross-references

qualifier = Orphanet mapping relation
SourceCodeQualifierICD relationValidation
OMIM618116Evalidated
ICD-10Q87.8NTBTattributedvalidated
MONDO0033683Evalidated
UMLSC5567897Evalidated

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

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Classification

Preferential parent (Orphanet linearisation):

Parents in the classifications (6):

No children.

4

Genes

1 direct
GeneAssociationStatusHGNCEnsemblOMIMLocusNameSource of validation
MYSM1Disease-causing germline mutation(s) inAssessedHGNC:29401ENSG000001626016121761p32.1Myb like, SWIRM and MPN domains 128115216[PMID]
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Prevalence and incidence

2 records
TypeClassValueAreaQualificationValidationSource
Cases/families5 casesWorldwideCase(s)Validated28115216[PMID]
Point prevalence<1 / 1 000 000—WorldwideClass onlyValidatedORPHANET_28115216[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.

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HPO phenotypes

38 annotations · validated 2020-01-23
HPOTerm (as annotated by Orphanet)Diagnostic
Very frequent (99-80%)
HP:0001903Anemia
HP:0005528Bone marrow hypocellularity
Frequent (79-30%)
HP:0001999Abnormal facial shape
HP:0006872Cerebral hypoplasia
HP:0000280Coarse facial features
HP:0001635Congestive heart failure
HP:0010976Decreased total B cell count
HP:0001875Decreased total neutrophil count
HP:0031688Erythroid dysplasia
HP:0001249Intellectual disability
HP:0001882Leukopenia
HP:0001888Lymphopenia
HP:0031689Megakaryocyte dysplasia
HP:0002863Myelodysplasia
HP:0012758Neurodevelopmental delay
HP:0002788Recurrent upper respiratory tract infections
HP:0001896Reticulocytopenia
HP:0004322Short stature
HP:0001873Thrombocytopenia
Occasional (29-5%)
HP:0000765Abnormal thorax morphology
HP:0001156Brachydactyly
HP:0000916Broad clavicles
HP:0000518Cataract
HP:0000684Delayed eruption of teeth
HP:0000958Dry skin
HP:0000964Eczematoid dermatitis
HP:0000212Gingival overgrowth
HP:0000365Hearing impairment
HP:0011800Midface retrusion
HP:0012817Noncompaction cardiomyopathy
HP:0012490Panniculitis
HP:0002783Recurrent lower respiratory tract infections
HP:0004991Rhizomelic arm shortening
HP:0005792Short humerus
HP:0010049Short metacarpal
HP:0001482Subcutaneous nodule
HP:0005180Tricuspid regurgitation
HP:0000243Trigonocephaly

Run the differential on the 2 obligate / very frequent terms

Annotation source: 30746751[PMID]_28115216[PMID]

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Sources for this card