raremaprare-disease reference indexOrphadata 2026-06-23 · HPO 2026-09-01
ORPHA:97297

Bohring-Opitz syndrome

Synonyms: BOS syndrome · Bohring syndrome · C-like syndrome · Oberklaid-Danks syndrome · Opitz trigonocephaly-like syndrome

Type
Malformation syndrome
Group
Disorder
Inheritance
Autosomal dominant
Age of onset
Antenatal, Neonatal
Status
active

A rare multiple congenital anomalies syndrome characterized by intrauterine growth retardation (IUGR), postnatal failure to thrive, severe feeding difficulties, microcephaly/trigonocephaly, facial dysmorphism, a recognizable upper limb posture and severe developmental delay. The upper limb posture consists of internal rotation of the shoulders, flexion of the elbows, ulnar deviation of wrists and/or metacarpophalangeal joints.

1

Names in Orphadata languages

12 of 12 languages
LangNameSynonyms
enBohring-Opitz syndromeBOS syndrome · Bohring syndrome · C-like syndrome · Oberklaid-Danks syndrome · Opitz trigonocephaly-like syndrome
frSyndrome de Bohring-OpitzSyndrome BOS · Syndrome C-like · Syndrome Oberklaid-Danks · Syndrome d'Opitz-like-trigonocéphalie · Syndrome de Bohring
deBohring-Opitz-SyndromBOS-Syndrom · Bohring-Syndrom · C-ähnliches-Syndrom · Oberklaid-Danks-Syndrom · Opitz Trigonozephalus-ähnliches Syndrom
esSíndrome de Bohring-OpitzSíndrome BOS · Síndrome de Bohring · Síndrome de Oberklaid-Danks · Síndrome de trigonocefalia tipo Opitz · Síndrome tipo C · Síndrome tipo trigonocefalia de Opitz
itSindrome di Bohring-OpitzSindrome BOS · Sindrome C-simile · Sindrome di Bohring · Sindrome di Oberklaid-Danks · Sindrome simil-trigonocefalica di Opitz
nlSyndroom van Bohring-OpitzBOS-syndroom · C-achtig syndroom · Opitz trigonocefalie-achtig syndroom · Syndroom van Bohring · Syndroom van Oberklaid-Danks
ptSíndrome C-like
plZespół Bohringa i OpitzaZespół Bohringa · Zespół BOS · Zespół Oberklaida i Danksa · Zespół podobny do C · Zespół podobny do trigonocefalii Opitza
csBohringův-Opitzův syndromBOS syndrom · C-like syndrom · Bohringův syndrom · Oberklaidův-Danksův syndrom · Opitzův syndrom podobný trigonocefalii · Bohring-Opitzův syndrom · Oberklaid-Danksův syndrom
ukСиндром Борінга-ОпітцаСиндром Борінга · BOS-синдром · С-подібний синдром · Синдром Оберклайда-Данкса · Тригоноцефалоподібний синдром Опітца
zhBohring-Opitz综合征Opitz三角头畸形样综合征
trBohring-Opitz sendromuBOS sendromu · C-benzeri sendrom · Bohring sendromu · Oberklaid-Danks sendromu · Opitz trigonosefali-benzeri sendrom

Definition in:

2

Cross-references

qualifier = Orphanet mapping relation
SourceCodeQualifierICD relationValidation
OMIM605039Evalidated
ICD-10Q87.8NTBTattributedvalidated
MONDO0011510Evalidated
MeSHC537419Evalidated
UMLSC0796232Evalidated
GARD10140Evalidated

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
ASXL1Disease-causing germline mutation(s) inAssessedHGNC:18318ENSG0000017145661299020q11.21ASXL transcriptional regulator 121706002[PMID]
5

Prevalence and incidence

2 records
TypeClassValueAreaQualificationValidationSource
Cases/families46 casesWorldwideCase(s)Validated29446906[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

65 annotations · validated 2021-04-14
HPOTerm (as annotated by Orphanet)Diagnostic
Very frequent (99-80%)
HP:0012758Neurodevelopmental delay
HP:0001052Nevus flammeus
Frequent (79-30%)
HP:0001274Agenesis of corpus callosum
HP:0002104Apnea
HP:0008936Axial hypotonia
HP:0001662Bradycardia
HP:0000589Coloboma
HP:0002803Congenital contracture
HP:0000297Facial hypotonia
HP:0008872Feeding difficulties in infancy
HP:0006471Fixed elbow flexion
HP:0012537Food intolerance
HP:0000293Full cheeks
HP:0040082Happy demeanor
HP:0000998Hypertrichosis
HP:0002079Hypoplasia of the corpus callosum
HP:0002540Inability to walk
HP:0002187Intellectual disability, profound
HP:0010864Intellectual disability, severe
HP:0001511Intrauterine growth retardation
HP:0001376Limitation of joint mobility
HP:0006895Lower limb hypertonia
HP:0000252Microcephaly
HP:0010733Naevus flammeus of the eyelid
HP:0002870Obstructive sleep apnea
HP:0000648Optic atrophy
HP:0005487Prominent metopic ridge
HP:0000520Proptosis
HP:0002719Recurrent infections
HP:0002205Recurrent respiratory infections
HP:0001105Retinal atrophy
HP:0006863Severe expressive language delay
HP:0001525Severe failure to thrive
HP:0004322Short stature
HP:0002360Sleep abnormality
HP:0000664Synophrys
HP:0000243Trigonocephaly
HP:0003049Ulnar deviation of the wrist
HP:0002013Vomiting
Occasional (29-5%)
HP:0000463Anteverted nares
HP:0012453Bilateral wrist flexion contracture
HP:0410030Cleft lip
HP:0000175Cleft palate
HP:0001305Dandy-Walker malformation
HP:0012448Delayed myelination
HP:0005280Depressed nasal bridge
HP:0011003High myopia
HP:0000316Hypertelorism
HP:0001373Joint dislocation
HP:0006070Metacarpophalangeal joint contracture
HP:0000347Micrognathia
HP:0000767Pectus excavatum
HP:0000358Posteriorly rotated ears
HP:0010291Prominent palatine ridges
HP:0000278Retrognathia
HP:0001250Seizure
HP:0000016Urinary retention
HP:0002119Ventriculomegaly
HP:0000431Wide nasal bridge
Very rare (<4-1%)
HP:0001671Abnormal cardiac septum morphology
HP:0001734Annular pancreas
HP:0001640Cardiomegaly
HP:0001081Cholelithiasis
HP:0002885Medulloblastoma
HP:0002667Nephroblastoma

Run the differential on the 2 obligate / very frequent terms

Annotation source: 29446906[PMID]

7

Sources for this card