raremaprare-disease reference indexOrphadata 2026-06-23 · HPO 2026-09-01
ORPHA:280633

Multiple congenital anomalies-hypotonia-seizures syndrome

Synonyms: Congenital disorder of glycosylation due to PIGN deficiency · PIGN-CDG

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

A rare, genetic, multiple congenital anomalies/dysmorphic syndrome characterized by severe global developmental delay, hypotonia, and early-onset seizures, associated with multiple congenital anomalies, such as cardiac (e.g. patent foramen ovale, atrial septal defect, patent ductus arteriosus), genitourinary (i.e. hydrocele, renal collecting system dilatation, hydroureter, hydronephrosis, hypertrophic trabecular urinary bladder) and gastrointestinal abnormalities (including gastroesophageal reflux, anal stenosis, imperforate anus, ano-vestibular fistula), as well as facial dysmorphism which includes coarse facies, a prominent occiput, bitemporal narrowing, epicanthal folds, hypertelorism, nystagmus/strabismus/wandering eyes, low-set, large ears with auricle abnormalities, depressed nasal bridge, upturned nose, long philtrum, large, open mouth with thin lips, high-arched palate, and micro/retrognathia.

1

Names in Orphadata languages

12 of 12 languages
LangNameSynonyms
enMultiple congenital anomalies-hypotonia-seizures syndromeCongenital disorder of glycosylation due to PIGN deficiency · PIGN-CDG
frSyndrome d'anomalies congénitales multiples-hypotonie-épilepsieAnomalie congénitale de la glycosylation par déficit en PIGN · PIGN-CDG
deMultiple kongenitale Anomalien-Hypotonie-Krampfanfälle-SyndromGlykosylierungs-Krankheit, kongenitale, durch PIGN-Mangel · Kohlenhydrat-defizientes Glykoprotein-Syndrom durch PIGN-Mangel · Kongenitaler Defekt der Glycoproteinbiosynthese durch PIGN-Mangel · MCAHS1 · PIGN-CDG
esSíndrome de anomalías congénitas múltiples-hipotonía-epilepsiaPIGN-CDG · Trastorno congénito de la glicosilación por deficiencia de PIGN
itSindrome anomalie congenite multiple-ipotonia-crisi epilettiche
nlMultipele congenitale anomalieën - hypotonie - insulten-syndroomCongenitale defecten van de glycosylering door PIGN-deficiëntie · Congenitale glycosylatiestoornis door PIGN-deficiëntie · Meervoudige aangeboren afwijkingen - hypotonie - insulten-syndroom · PIGN-CDG
ptSíndrome de anomalias congénitas múltiplas-hipotonia-convulsões
plZespół mnogie wady wrodzone - hipotonia - drgawki= en
csSyndrom zahrnující mnohočetné vrozené vývojové vady, hypotonii a záchvaty= en
ukСиндром множинних вроджених аномалій-гіпотонії-судомВроджене порушення глікозилювання внаслідок дефіциту PIGN · PIGN-CDG
zh多重先天性异常-肌张力低下-癫痫综合征PIGN缺陷所致先天性糖基化障碍
trÇoklu doğumsal anomaliler-hipotoni-nöbet sendromuPIGN-CDG · PIGN eksikliğine bağlı doğumsal glikozilasyon bozukluğu

Definition in:

2

Cross-references

qualifier = Orphanet mapping relation
SourceCodeQualifierICD relationValidation
OMIM614080Evalidated
ICD-10Q87.8NTBTattributedvalidated
ICD-11LD2F.1YNTBTattributedvalidated
MONDO0013563Evalidated
UMLSC5191419Evalidated
GARD12781Evalidated

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 (5):

No children.

4

Genes

1 direct
GeneAssociationStatusHGNCEnsemblOMIMLocusNameSource of validation
PIGNDisease-causing germline mutation(s) inAssessedHGNC:8967ENSG0000019756360609718q21.33phosphatidylinositol glycan anchor biosynthesis class N21493957[PMID]
5

Prevalence and incidence

2 records
TypeClassValueAreaQualificationValidationSource
Cases/families15 casesWorldwideCase(s)Validated26394714[PMID]_26364997[PMID]
Point prevalence<1 / 1 000 000—WorldwideClass onlyValidatedORPHANET_26394714[PMID]_26364997[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

86 annotations · validated 2019-02-06
HPOTerm (as annotated by Orphanet)Diagnostic
Very frequent (99-80%)
HP:0001263Global developmental delay
HP:0000639Nystagmus
HP:0001250Seizure
HP:0011344Severe global developmental delay
HP:0006829Severe muscular hypotonia
Frequent (79-30%)
HP:0001156Brachydactyly
HP:0000280Coarse facial features
HP:0012448Delayed myelination
HP:0008872Feeding difficulties in infancy
HP:0002020Gastroesophageal reflux
HP:0000218High palate
HP:0001615Hoarse cry
HP:0001265Hyporeflexia
HP:0004488Macrocephaly at birth
HP:0001655Patent foramen ovale
HP:0010291Prominent palatine ridges
HP:0011247Prominent superior crus of antihelix
HP:0001773Short foot
HP:0200055Small hand
HP:0000486Strabismus
HP:0001182Tapered finger
HP:0001337Tremor
Occasional (29-5%)
HP:0004742Abnormal renal collecting system morphology
HP:0000932Abnormality of the posterior cranial fossa
HP:0000646Amblyopia
HP:0002023Anal atresia
HP:0002025Anal stenosis
HP:0000463Anteverted nares
HP:0002616Aortic root aneurysm
HP:0011333Asymmetric crying face
HP:0002305Athetosis
HP:0001631Atrial septal defect
HP:0000498Blepharitis
HP:0001272Cerebellar atrophy
HP:0008676Congenital megaureter
HP:0004681Deep longitudinal plantar crease
HP:0002015Dysphagia
HP:0006254Elevated alpha-fetoprotein
HP:0000286Epicanthus
HP:0000565Esotropia
HP:0002286Fair hair
HP:0005830Flexion contracture of toe
HP:0000293Full cheeks
HP:0003324Generalized muscle weakness
HP:0000212Gingival overgrowth
HP:0000034Hydrocele testis
HP:0000126Hydronephrosis
HP:0000072Hydroureter
HP:0007441Hyperpigmented/hypopigmented macules
HP:0001347Hyperreflexia
HP:0000316Hypertelorism
HP:0002079Hypoplasia of the corpus callosum
HP:0001804Hypoplastic fingernail
HP:0010880Increased nuchal translucency
HP:0002265Large fleshy ears
HP:0000308Microretrognathia
HP:0008551Microtia
HP:0000774Narrow chest
HP:0000160Narrow mouth
HP:0000396Overfolded helix
HP:0002951Partial absence of cerebellar vermis
HP:0001643Patent ductus arteriosus
HP:0004969Peripheral pulmonary artery stenosis
HP:0001761Pes cavus
HP:0000269Prominent occiput
HP:0011271Prominent tragus
HP:0006165Proportionate shortening of all digits
HP:0008994Proximal muscle weakness in lower limbs
HP:0002092Pulmonary arterial hypertension
HP:0025025Rectovestibular fistula
HP:0002100Recurrent aspiration pneumonia
HP:0001667Right ventricular hypertrophy
HP:0000470Short neck
HP:0003196Short nose
HP:0000350Small forehead
HP:0000319Smooth philtrum
HP:0000664Synophrys
HP:0010804Tented upper lip vermilion
HP:0010282Thin lower lip vermilion
HP:0000219Thin upper lip vermilion
HP:0008718Unilateral renal dysplasia
HP:0000582Upslanted palpebral fissure
HP:0008635Urinary bladder wall hypertrophy
HP:0002119Ventriculomegaly
HP:0010544Vertical nystagmus
HP:0000154Wide mouth

Run the differential on the 5 obligate / very frequent terms

Annotation source: 21493957[PMID]_26364997[PMID]_26394714[PMID]_26419326[PMID]_24253414[PMID]

7

Sources for this card