National Center for Advancing and Translational Sciences Genetic and Rare Diseases Information Center, a program of the National Center for Advancing and Translational Sciences

Multiple congenital anomalies-hypotonia-seizures syndrome



Other Names:
Multiple congenital anomalies-hypotonia-seizures syndrome 1 ; MCAHS1; PIGN-CDG; Multiple congenital anomalies-hypotonia-seizures syndrome 1 ; MCAHS1; PIGN-CDG; Congenital disorder of glycosylation due to PIGN deficiency See More
Categories:
This disease is grouped under:
Congenital disorder of glycosylation with developmental anomaly

The following summary is from Orphanet, a European reference portal for information on rare diseases and orphan drugs.
orphanet

Orpha Number: 280633

Definition
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 (incl. gastroesophageal reflux, anal stenosis, imperforate anus, ano-vestibular fistula) abnormalities, 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.

Visit the Orphanet disease page for more resources.
Last updated: 2/1/2019

This table lists symptoms that people with this disease may have. For most diseases, symptoms will vary from person to person. People with the same disease may not have all the symptoms listed. This information comes from a database called the Human Phenotype Ontology (HPO) . The HPO collects information on symptoms that have been described in medical resources. The HPO is updated regularly. Use the HPO ID to access more in-depth information about a symptom.

Showing of 118 |
Medical Terms Other Names
Learn More:
HPO ID
80%-99% of people have these symptoms
Seizure 0001250
Severe global developmental delay 0011344
Severe muscular hypotonia
Severely decreased muscle tone
0006829
30%-79% of people have these symptoms
Brachydactyly
Short fingers or toes
0001156
Choreoathetosis 0001266
Coarse facial features
Coarse facial appearance
0000280
Delayed myelination 0012448
Feeding difficulties in infancy 0008872
Gastroesophageal reflux
Acid reflux
Acid reflux disease
Heartburn
[ more ]
0002020
High palate
Elevated palate
Increased palatal height
[ more ]
0000218
Hoarse cry 0001615
Hyperreflexia
Increased reflexes
0001347
Hyporeflexia
Decreased reflex response
Decreased reflexes
[ more ]
0001265
Macrocephaly
Increased size of skull
Large head
Large head circumference
[ more ]
0000256
Macrocephaly at birth
Big skull present at birth
Big skull present since birth
Large skull present at birth
Large skull present since birth
[ more ]
0004488
Patent foramen ovale 0001655
Prominent palatine ridges 0010291
Prominent superior crus of antihelix 0011247
Short foot
Short feet
Small feet
[ more ]
0001773
Small hand
Disproportionately small hands
0200055
Tapered finger
Tapered fingertips
Tapering fingers
[ more ]
0001182
Tremor 0001337
5%-29% of people have these symptoms
Abnormal renal collecting system morphology 0004742
Abnormality of the posterior cranial fossa 0000932
Amblyopia
Lazy eye
Wandering eye
[ more ]
0000646
Anal atresia
Absent anus
0002023
Anal stenosis
Narrowing of anal opening
0002025
Anteverted nares
Nasal tip, upturned
Upturned nasal tip
Upturned nose
Upturned nostrils
[ more ]
0000463
Aortic root aneurysm
Bulge in wall of root of large artery that carries blood away from heart
0002616
Asymmetric crying face 0011333
Athetosis
Involuntary writhing movements in fingers, hands, toes, and feet
0002305
Blepharitis
Inflammation of eyelids
0000498
Cerebellar atrophy
Degeneration of cerebellum
0001272
Congenital diaphragmatic hernia 0000776
Congenital megaureter 0008676
Deep longitudinal plantar crease 0004681
Dysphagia
Poor swallowing
Swallowing difficulties
Swallowing difficulty
[ more ]
0002015
Elevated alpha-fetoprotein 0006254
Epicanthus
Eye folds
Prominent eye folds
[ more ]
0000286
Esotropia
Inward turning cross eyed
0000565
Fair hair
Blond hair
Fair hair color
Flaxen hair color
Light colored hair
Sandy hair color
Straw colored hair
Towhead (hair color)
[ more ]
0002286
Flexion contracture of toe 0005830
Full cheeks
Apple cheeks
Big cheeks
Increased size of cheeks
Large cheeks
[ more ]
0000293
Generalized muscle weakness 0003324
Gingival overgrowth
Gum enlargement
0000212
Hydrocele testis 0000034
Hydronephrosis 0000126
Hydroureter 0000072
Hyperpigmented/hypopigmented macules 0007441
Hypertelorism
Wide-set eyes
Widely spaced eyes
[ more ]
0000316
Hypertrophy of the urinary bladder 0008635
Hypoplasia of the corpus callosum
Underdevelopment of part of brain called corpus callosum
0002079
Hypoplastic fingernail
Small fingernail
Underdeveloped fingernail
[ more ]
0001804
Increased nuchal translucency 0010880
Large fleshy ears 0002265
Microretrognathia
Small retruded chin
0000308
Microtia
Small ears
Underdeveloped ears
[ more ]
0008551
Narrow chest
Low chest circumference
Narrow shoulders
[ more ]
0000774
Narrow mouth
Small mouth
0000160
Overfolded helix
Overfolded ears
0000396
Partial absence of cerebellar vermis 0002951
Patent ductus arteriosus 0001643
Peripheral pulmonary artery stenosis
Narrowing of peripheral lung artery
0004969
Pes cavus
High-arched foot
0001761
Prominent occiput
Prominent back of the skull
Prominent posterior skull
[ more ]
0000269
Prominent tragus 0011271
Proportionate shortening of all digits 0006165
Proximal muscle weakness in lower limbs 0008994
Pulmonary arterial hypertension
Increased blood pressure in blood vessels of lungs
0002092
Pulmonary hypoplasia
Small lung
Underdeveloped lung
[ more ]
0002089
Rectovestibular fistula 0025025
Recurrent aspiration pneumonia 0002100
Right ventricular hypertrophy 0001667
Short neck
Decreased length of neck
0000470
Short nose
Decreased length of nose
Shortened nose
[ more ]
0003196
Small forehead
Decreased size of forehead
0000350
Smooth philtrum 0000319
Synophrys
Monobrow
Unibrow
[ more ]
0000664
Tented upper lip vermilion 0010804
Thin lower lip vermilion
Decreased volume of lower lip
Thin lower lip
[ more ]
0010282
Thin upper lip vermilion
Thin upper lip
0000219
Unilateral renal dysplasia 0008718
Upslanted palpebral fissure
Upward slanting of the opening between the eyelids
0000582
Ventriculomegaly 0002119
Vertical nystagmus 0010544
Vesicoureteral reflux 0000076
Wide mouth
Broad mouth
Large mouth
[ more ]
0000154
1%-4% of people have these symptoms
Ureteral hypoplasia 0032464
Percent of people who have these symptoms is not available through HPO
Abnormality of the ilium 0002867
Absent speech
Absent speech development
Lack of language development
Lack of speech
No speech development
No speech or language development
Nonverbal
[ more ]
0001344
Atrial septal defect
An opening in the wall separating the top two chambers of the heart
Hole in heart wall separating two upper heart chambers
[ more ]
0001631
Autosomal recessive inheritance 0000007
Bladder trabeculation 0032465
Cerebral atrophy
Degeneration of cerebrum
0002059
Cleft palate
Cleft roof of mouth
0000175
Congenital onset
Symptoms present at birth
0003577
Cupped ear
Cup-shaped ears
Simple, cup-shaped ears
[ more ]
0000378
Deep plantar creases
Deep wrinkles in soles of feet
0001869
Depressed nasal bridge
Depressed bridge of nose
Flat bridge of nose
Flat nasal bridge
Flat, nasal bridge
Flattened nasal bridge
Low nasal bridge
Low nasal root
[ more ]
0005280
Frontal bossing 0002007
Generalized hypotonia
Decreased muscle tone
Low muscle tone
[ more ]
0001290
Global developmental delay 0001263
Intellectual disability
Mental deficiency
Mental retardation
Mental retardation, nonspecific
Mental-retardation
[ more ]
0001249
Large for gestational age
Birth weight > 90th percentile
Birthweight > 90th percentile
[ more ]
0001520
Long philtrum 0000343
Low-set ears
Low set ears
Lowset ears
[ more ]
0000369
Micrognathia
Little lower jaw
Small jaw
Small lower jaw
[ more ]
0000347
Narrow forehead
Decreased width of the forehead
0000341
Nystagmus
Involuntary, rapid, rhythmic eye movements
0000639
Open mouth
Gaped jawed appearance
Gaped mouthed appearance
Slack jawed appearance
[ more ]
0000194
Polyhydramnios
High levels of amniotic fluid
0001561
Posteriorly rotated ears
Ears rotated toward back of head
0000358
Renal dysplasia 0000110
Short distal phalanx of finger
Short outermost finger bone
0009882
Spasticity
Involuntary muscle stiffness, contraction, or spasm
0001257
Thin vermilion border
Decreased volume of lip
Thin lips
[ more ]
0000233
Ureteral duplication
Double ureter
0000073
Variable expressivity 0003828
Showing of 118 |
Last updated: 7/1/2020

If you need medical advice, you can look for doctors or other healthcare professionals who have experience with this disease. You may find these specialists through advocacy organizations, clinical trials, or articles published in medical journals. You may also want to contact a university or tertiary medical center in your area, because these centers tend to see more complex cases and have the latest technology and treatments.

If you can’t find a specialist in your local area, try contacting national or international specialists. They may be able to refer you to someone they know through conferences or research efforts. Some specialists may be willing to consult with you or your local doctors over the phone or by email if you can't travel to them for care.

You can find more tips in our guide, How to Find a Disease Specialist. We also encourage you to explore the rest of this page to find resources that can help you find specialists.

Healthcare Resources


Support and advocacy groups can help you connect with other patients and families, and they can provide valuable services. Many develop patient-centered information and are the driving force behind research for better treatments and possible cures. They can direct you to research, resources, and services. Many organizations also have experts who serve as medical advisors or provide lists of doctors/clinics. Visit the group’s website or contact them to learn about the services they offer. Inclusion on this list is not an endorsement by GARD.


These resources provide more information about this condition or associated symptoms. The in-depth resources contain medical and scientific language that may be hard to understand. You may want to review these resources with a medical professional.

In-Depth Information

  • The Monarch Initiative brings together data about this condition from humans and other species to help physicians and biomedical researchers. Monarch’s tools are designed to make it easier to compare the signs and symptoms (phenotypes) of different diseases and discover common features. This initiative is a collaboration between several academic institutions across the world and is funded by the National Institutes of Health. Visit the website to explore the biology of this condition.
  • Online Mendelian Inheritance in Man (OMIM) is a catalog of human genes and genetic disorders. Each entry has a summary of related medical articles. It is meant for health care professionals and researchers. OMIM is maintained by Johns Hopkins University School of Medicine. 
  • Orphanet is a European reference portal for information on rare diseases and orphan drugs. Access to this database is free of charge.

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