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

Hydrolethalus syndrome



Other Names:
HLS

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.

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Medical Terms Other Names
Learn More:
HPO ID
1%-4% of people have these symptoms
Abnormal lung lobation 0002101
Abnormality of the pinna
Abnormally shaped ears
Auricular malformation
Deformed ears
Malformed ears
[ more ]
0000377
Anencephaly 0002323
Bifid uterus 0000136
Cleft in skull base 0009752
Laryngeal hypoplasia 0008749
Low-set ears
Low set ears
Lowset ears
[ more ]
0000369
Micrognathia
Little lower jaw
Small jaw
Small lower jaw
[ more ]
0000347
Microphthalmia
Abnormally small eyeball
0000568
Polyhydramnios
High levels of amniotic fluid
0001561
Postaxial hand polydactyly
Extra little finger
Extra pinkie finger
Extra pinky finger
[ more ]
0001162
Preaxial hand polydactyly
Extra thumb
0001177
Severe hydrocephalus 0006882
Stillbirth
Stillborn
0003826
Talipes equinovarus
Club feet
Club foot
Clubfeet
Clubfoot
[ more ]
0001762
Tracheal stenosis
Narrowing of windpipe
0002777
Percent of people who have these symptoms is not available through HPO
Abnormal cortical gyration 0002536
Abnormal vagina morphology 0000142
Absent septum pellucidum 0001331
Accessory spleen 0001747
Adrenal gland dysgenesis 0008216
Agenesis of corpus callosum 0001274
Agenesis of the diaphragm
Absent diaphragm
0008986
Arrhinencephaly 0002139
Autosomal recessive inheritance 0000007
Bifid nose
Indentation or clefting of the nose
0011803
Broad neck
Increased width of neck
Wide neck
[ more ]
0000475
Cleft palate
Cleft roof of mouth
0000175
Complete atrioventricular canal defect 0001674
Dandy-Walker malformation 0001305
Duplication of phalanx of hallux
Duplication of big toe bone
Duplication of great toes
[ more ]
0010066
Gray matter heterotopia 0002282
Hydronephrosis 0000126
Hypospadias 0000047
Intrauterine growth retardation
Prenatal growth deficiency
Prenatal growth retardation
[ more ]
0001511
Median cleft lip
Central cleft upper lip
0000161
Omphalocele 0001539
Proximal tibial hypoplasia 0006379
Upper limb undergrowth
Short arms
Shortening of the arms
[ more ]
0009824
Ventricular septal defect
Hole in heart wall separating two lower heart chambers
0001629
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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


Research helps us better understand diseases and can lead to advances in diagnosis and treatment. This section provides resources to help you learn about medical research and ways to get involved.

Clinical Research Resources

  • ClinicalTrials.gov lists trials that are related to Hydrolethalus syndrome. Click on the link to go to ClinicalTrials.gov to read descriptions of these studies.

    Please note: Studies listed on the ClinicalTrials.gov website are listed for informational purposes only; being listed does not reflect an endorsement by GARD or the NIH. We strongly recommend that you talk with a trusted healthcare provider before choosing to participate in any clinical study.

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. 
  • PubMed is a searchable database of medical literature and lists journal articles that discuss Hydrolethalus syndrome. Click on the link to view a sample search on this topic.

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