raremaprare-disease reference indexOrphadata 2026-06-23 · HPO 2026-09-01
ORPHA:2760

OSLAM syndrome

historical

Synonyms: Osteosarcoma-limb anomalies-erythroid macrocytosis syndrome

Type
Malformation syndrome
Group
Disorder
Inheritance
Autosomal dominant
Age of onset
Neonatal
Status
historical

A rare genetic disease characterized by the association of osteosarcoma with limb anomalies (such as bilateral radioulnar synostosis and clinodactyly, as well as other abnormalities of the hands and feet) and erythroid macrocytosis without anemia. There have been no further descriptions in the literature since 1977.

1

Names in Orphadata languages

12 of 12 languages
LangNameSynonyms
enOSLAM syndromeOsteosarcoma-limb anomalies-erythroid macrocytosis syndrome
frSyndrome OSLAMSyndrome d'ostéosarcome-anomalies des membres-macrocytose érythroïde
deOSLAM-Syndrom
esSíndrome OSLAMOsteosarcoma-anomalías de las extremidades-macrocitosis eritroide
itSindrome OSLAMOsteosarcoma - anomalie degli arti - macrocitosi eritrocitaria
nlOSLAM-syndroomOsteosarcoom - ledemaatanomalieën - erytroïde macrocytose-syndroom
ptSíndrome OSLAMSíndrome osteossarcoma-anomalias dos membros-macrocitose eritróide
plZespół OSLAMKostniakomięsak - wady kończyn - makrocytoza krwinek czerwonych
csOSLAM syndromSyndrom zahrnující osteosarkom, anomálie koncetin a erytroidní makrocyty · Syndrom zahrnující osteosarkom, anomálie končetin a erytroidní makrocyty
ukСиндром OSLAMСиндром остеосаркоми - аномалії кінцівок - еритроїдного макроцитозу
zhOSLAM综合征骨肉瘤-肢体异常-大红细胞综合征
trOSLAM sendromuOsteosarkom-ekstremite anomalileri-eritroid makrositoz sendromu

Definition in:

2

Cross-references

qualifier = Orphanet mapping relation
SourceCodeQualifierICD relationValidation
OMIM165660Evalidated
ICD-10C41.9NTBTattributedvalidated
MONDO0008139Evalidated
MeSHC537138Evalidated
UMLSC1833792Evalidated
GARD4129Evalidated

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

0 direct

Orphanet records no gene directly on this code.

5

Prevalence and incidence

2 records
TypeClassValueAreaQualificationValidationSource
Cases/families3 casesWorldwideCase(s)Validated201363[PMID]
Point prevalence<1 / 1 000 000—WorldwideClass onlyValidatedORPHANET_201363[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

7 annotations · validated 2016-06-01
HPOTerm (as annotated by Orphanet)Diagnostic
Very frequent (99-80%)
HP:0001874Abnormality of neutrophils
HP:0000670Carious teeth
HP:0005518Increased mean corpuscular volume
HP:0002669Osteosarcoma
Frequent (79-30%)
HP:0004322Short stature
Occasional (29-5%)
HP:0004209Clinodactyly of the 5th finger
HP:0002974Radioulnar synostosis
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Sources for this card