raremaprare-disease reference indexOrphadata 2026-06-23 · HPO 2026-09-01
ORPHA:3369

Trigonocephaly-short stature-developmental delay syndrome

historical

Synonyms: Say-Meyer syndrome

Type
Malformation syndrome
Group
Disorder
Inheritance
Unknown
Age of onset
No data available
Status
historical

A rare syndromic craniosynostosis characterized by trigonocephaly prominent metopic ridge, short stature, and developmental delay. Dysmorphic features may also include narrow forehead with bitemporal narrowing, arched eyebrows, deep-set eyes, epicanthal folds, hypotelorism, strabismus, wide nasal bridge, small pointed nose, anteverted nostrils, long philtrum, low-set ears, malar flattening, narrow mouth, thin lips, high-arched palate, crowded teeth, and micrognathia. Variable additional manifestations may include conductive hearing loss, cerebral (mainly involving the white matter), skeletal (including brachymesophalangy of the fifth fingers), cardiovascular and renal anomalies, inguinal hernia, hypospadias, and seizures. There have been no further descriptions in the literature since 1981.

1

Names in Orphadata languages

12 of 12 languages
LangNameSynonyms
enTrigonocephaly-short stature-developmental delay syndromeSay-Meyer syndrome
frSyndrome de trigonocéphalie-petite taille-retard de croissanceSyndrome de Say-Meyer
deTrigonozephalie-Kleinwuchs-Entwicklungsverzögerung-SyndromSay-Meyer-Syndrom
esSíndrome de trigonocefalia-talla baja-retraso de crecimientoSíndrome de Say-Meyer
itSindrome trigonocefalia-bassa statura-ritardo dello sviluppoSindrome di Say-Meyer
nlTrigonocefalie - kleine gestalte - ontwikkelingsachterstand-syndroomSyndroom van Say-Meyer
ptSíndrome de trigonocefalia-baixa estatura-perturbação do desenvolvimentoSíndrome Say-Meyer
plTrigonocefalia - niski wzrost - opóźnienie w rozwojuZespół Say'a i Meyera
csSyndrom zahrnující trigonocefalii, nízký vzrůst a opoždění vývojeSayův-Meyerův syndrom · Say-Meyerův syndrom
ukСиндром тригоноцефалії-низькорослості-затримки розвиткуСиндром Сай-Мейєра
zh三角头畸形-矮小-发育迟缓综合征Say-Meyer综合征
trTrigonosefali-kısa boy-gelişme geriliği sendromuSay-Meyer sendromu

Definition in:

2

Cross-references

qualifier = Orphanet mapping relation
SourceCodeQualifierICD relationValidation
OMIM314320Evalidated
ICD-10Q87.0NTBTattributedvalidated
MONDO0010749Evalidated
MeSHC536620Evalidated
UMLSC1839125Evalidated
GARD243Evalidated

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)Validated6168197[PMID]
Point prevalence<1 / 1 000 000—WorldwideClass onlyValidatedORPHANET_6168197[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

23 annotations · validated 2017-11-06
HPOTerm (as annotated by Orphanet)Diagnostic
Very frequent (99-80%)
HP:0001263Global developmental delayDiagnostic criterion
HP:0004322Short statureDiagnostic criterion
HP:0000243TrigonocephalyDiagnostic criterion
Frequent (79-30%)
HP:0000216Broad secondary alveolar ridge
HP:0000444Convex nasal ridge
HP:0000286Epicanthus
HP:0005769Fifth finger distal phalanx clinodactyly
HP:0000218High palate
HP:0000601Hypotelorism
HP:0000023Inguinal hernia
HP:0002342Intellectual disability, moderate
HP:0005495Metopic suture patent to nasal root
HP:0011324Multiple suture craniosynostosis
HP:0000341Narrow forehead
HP:0000358Posteriorly rotated ears
HP:0008897Postnatal growth retardation
HP:0005494Premature posterior fontanelle closure
HP:0005484Secondary microcephaly
HP:0001250Seizure
HP:0000237Small anterior fontanelle
HP:0001518Small for gestational age
HP:0001629Ventricular septal defect
HP:0000431Wide nasal bridge

Annotation source: 6168197[PMID]_1271432[PMID]

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Sources for this card