Hutchinson-Gilford progeria syndrome

What it is, symptoms and effects

From: MedlinePlus Genetics, National Library of Medicine

Hutchinson-Gilford progeria syndrome is a genetic condition characterized by the dramatic, rapid appearance of aging beginning in childhood. Affected children typically look normal at birth and in early infancy, but then grow more slowly than other children and do not gain weight at the expected rate (faltering weight). They develop a characteristic facial appearance including prominent eyes, a thin nose with a beaked tip, thin lips, a small chin, and protruding ears. Hutchinson-Gilford progeria syndrome also causes hair loss (alopecia), aged-looking skin, joint abnormalities, and a loss of fat under the skin (subcutaneous fat). This condition does not affect intellectual development or the development of motor skills such as sitting, standing, and walking.

People with Hutchinson-Gilford progeria syndrome experience severe hardening of the arteries (arteriosclerosis) beginning in childhood. This condition greatly increases the chances of having a heart attack or stroke at a young age. These serious complications can worsen over time and are life-threatening for affected individuals.

Causes and biological mechanisms

From: MedlinePlus Genetics, National Library of Medicine

Mutations in the LMNA gene cause Hutchinson-Gilford progeria syndrome. The LMNA gene provides instructions for making a protein called lamin A. This protein plays an important role in determining the shape of the nucleus within cells. It is an essential scaffolding (supporting) component of the nuclear envelope, which is the membrane that surrounds the nucleus. Mutations that cause Hutchinson-Gilford progeria syndrome result in the production of an abnormal version of the lamin A protein. The altered protein makes the nuclear envelope unstable and progressively damages the nucleus, making cells more likely to die prematurely. Researchers are working to determine how these changes lead to the characteristic features of Hutchinson-Gilford progeria syndrome.

Inheritance and family implications

From: MedlinePlus Genetics, National Library of Medicine

Hutchinson-Gilford progeria syndrome is considered an autosomal dominant condition, which means one copy of the altered gene in each cell is sufficient to cause the disorder. The condition results from new mutations in the LMNA gene, and almost always occurs in people with no history of the disorder in their family.

How common is it?

From: MedlinePlus Genetics, National Library of Medicine

This condition is very rare; it is reported to occur in 1 in 4 million newborns worldwide. More than 130 cases have been reported in the scientific literature since the condition was first described in 1886.

Reported clinical features and what the terms mean

The following findings are associated with this condition in Orphanet. They are not a checklist for diagnosing yourself, and they do not all occur in every affected person. Some are examination, imaging or laboratory findings that cannot be recognised at home.

The frequency labels describe how often a finding was reported among people with the condition in the source. They do not give the chance that a person with that symptom has the condition. Definitions below reproduce HPO terminology; they explain the term, not the likely severity in an individual.

Absence of subcutaneous fat · Very frequent (99-80%)

Lack of subcutaneous adipose tissue.

Conductive hearing impairment · Very frequent (99-80%)

An abnormality of vibrational conductance of sound to the inner ear leading to impairment of sensory perception of sound.

Generalized abnormality of skin · Very frequent (99-80%)

An abnormality of the skin that is not localized to any one particular region.

Micrognathia · Very frequent (99-80%)

Developmental hypoplasia of the mandible.

Narrow mouth · Very frequent (99-80%)

Distance between the commissures of the mouth more than 2 SD below the mean. Alternatively, an apparently decreased width of the oral aperture (subjective).

Premature skin wrinkling · Very frequent (99-80%)

The presence of an increased degree of wrinkling (irregular folds and indentations) of the skin as compared with age-related norms.

Prominent umbilicus · Very frequent (99-80%)

Abnormally prominent umbilicus (belly button).

Thin vermilion border · Very frequent (99-80%)

Height of the vermilion of the medial part of the lip more than 2 SD below the mean, or apparently reduced height of the vermilion of the lip in the frontal view. The vermilion is the red part of the lips (and confusingly, the vermilion itself is also often referred to as being equivalent the lips).

Weight loss · Very frequent (99-80%)

Reduction of total body weight.

Prominent superficial blood vessels · Very frequent (99-80%)

Pubertal developmental failure in females · Very frequent (99-80%)

Severe failure to thrive · Very frequent (99-80%)

Abnormal aortic valve morphology · Frequent (79-30%)

Any abnormality of the aortic valve.

Abnormal mitral valve morphology · Frequent (79-30%)

Any structural anomaly of the mitral valve.

Other findings in the same source

From: Orphanet

Additional reported features include Abnormality of the nasal tip (Frequent (79-30%)); Abnormally high-pitched voice (Frequent (79-30%)); Alopecia totalis (Frequent (79-30%)); Ankyloglossia (Frequent (79-30%)); Atherosclerosis (Frequent (79-30%)); Coxa valga (Frequent (79-30%)); Decreased serum leptin (Frequent (79-30%)); Delayed menarche (Frequent (79-30%)); Dystrophic fingernails (Frequent (79-30%)); Dystrophic toenail (Frequent (79-30%)). This is a selected summary, not a complete description of the condition.

Which doctor should you see?

The suggested department for discussing Hutchinson-Gilford progeria syndrome is Clinical Genetics, with a clinical geneticist as the relevant type of clinician. Paediatrician (children) or physician (adults), with clinical geneticist referral.

This is an editorial referral starting point. The appropriate clinic depends on the person’s age, symptoms, previous diagnosis and local services. The first clinician can decide whether another specialty or a team is needed; a department label does not confirm the diagnosis.

How to prepare for an assessment

Bring a short timeline of the main symptoms: when they first appeared, whether they are constant or episodic, what seems to change them, and how they affect daily activities. Include previous reports, discharge summaries, current medicines and supplements, allergies, and any relevant family history. A dated record is more useful than trying to match every feature in an online article.

Ask the clinician what is already established and what remains uncertain. If a test is suggested, ask what question it answers, what its limitations are and how the result would change the next step. The information here is not an instruction to arrange every possible test. In children, bring growth, developmental and school information if it is relevant to the concern.

• Does the exact genetic or chromosome finding explain the observed features?
• Would a genetic counsellor help the family understand the result?
• Which organ-specific assessments are appropriate for this particular diagnosis?

Treatment discussions and follow-up

The material gathered for this draft does not provide a complete condition-specific treatment pathway for Hutchinson-Gilford progeria syndrome. That gap does not mean that treatment is unavailable. A clinician needs to establish the diagnosis and review current guidance before recommending medicines, procedures, rehabilitation or other support.

Before leaving the appointment, clarify the next review date, who will communicate results, and whom to contact if the situation changes. Discuss difficulties with sleep, work, school, mobility, eating or emotional wellbeing when these are relevant. Practical support may require coordination between the treating clinician and other services.

The collected references do not establish a complete prevention or long-term outlook section for this entry. Missing information should not be interpreted as proof that prevention is impossible or that a particular outcome is inevitable. Ask what is known for the exact subtype, stage and personal circumstances, and which uncertainties remain.

When to seek emergency help

Severe breathing difficulty, collapse, new stroke-like symptoms, a seizure that is prolonged or repeated without recovery, uncontrolled major bleeding, or an immediate risk of self-harm require emergency help. In India, call 112 or reach the nearest emergency department. This is a general, non-exhaustive warning list; it is not a condition-specific triage tool.