Oculofaciocardiodental syndrome

What it is, symptoms and effects

From: MedlinePlus Genetics, National Library of Medicine

Oculofaciocardiodental (OFCD) syndrome is a condition that affects the development of the eyes (oculo-), facial features (facio-), heart (cardio-), and teeth (dental).

The eye abnormalities associated with OFCD syndrome can affect one or both eyes. Many people with this condition are born with eyeballs that are abnormally small (microphthalmia). Other eye problems can include clouding of the lens (cataract) and a high risk of glaucoma, an eye disease that increases the pressure in the eye. These abnormalities can lead to vision loss or blindness.

People with OFCD syndrome often have a long, narrow face with distinctive facial features, including deep-set eyes, droopy eyelids (ptosis), and a nose with a high bridge and broad tip. Affected individuals may have a split (cleft) in their nose or in the roof of their mouth (cleft palate).

Heart defects are another common feature of OFCD syndrome. Babies with this condition may be born with a hole between two chambers of the heart (an atrial or ventricular septal defect) or a leak in one of the valves that controls blood flow through the heart (mitral valve prolapse).

Teeth with very large roots (radiculomegaly) are characteristic of OFCD syndrome. Additional dental abnormalities can include the delayed loss of primary (baby) teeth, missing or abnormally small teeth, delayed teething (dentition), misaligned teeth, and defective tooth enamel.

Individuals with OFCD syndrome can have additional features, such as skeletal abnormalities (typically affecting the toes), hearing loss, and intellectual disabilities.

Causes and biological mechanisms

From: MedlinePlus Genetics, National Library of Medicine

Variants (also called mutations) in the BCOR gene cause OFCD syndrome. The BCOR gene provides instructions for making a protein called the BCL6 corepressor. This protein helps regulate the activity of other genes. Specifically, the BCL6 corepressor appears to play an important role in regulating genes during early development, particularly those that are involved in the formation of the eye and other organs and tissues.

The variants in the BCOR gene that cause OFCD syndrome prevent the production of any functional BCL6 corepressor protein. As a result, gene regulation during development is disrupted, which impairs the normal development of the eyes and several other organs and tissues before birth.

Inheritance and family implications

From: MedlinePlus Genetics, National Library of Medicine

OFCD syndrome is inherited in an X-linked dominant pattern. The BCOR gene is located on the X chromosome, which is one of the two sex chromosomes. In females (who have two X chromosomes), a variant in one of the two copies of the gene in each cell is sufficient to cause the disorder. As a result, some cells produce a normal amount of BCL6 corepressor protein and other cells produce none, leading to about half the normal amount of protein.

No males (with only one X chromosome) have been born with OFCD syndrome. A BCOR gene variant in the only copy of the gene would cause a complete lack of BCL6 corepressor protein, and this is thought to be lethal very early in development.

How common is it?

From: MedlinePlus Genetics, National Library of Medicine

OFCD syndrome is very rare; the incidence is estimated to be less than 1 in 1 million people.

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.

Abnormal cardiac septum morphology · Very frequent (99-80%)

An anomaly of the intra-atrial or intraventricular septum.

Abnormality of the dentition · Very frequent (99-80%)

Any abnormality of the teeth.

Bifid nasal tip · Very frequent (99-80%)

A splitting of the nasal tip. Visually assessable vertical indentation, cleft, or depression of the nasal tip.

Cataract · Very frequent (99-80%)

A cataract is an opacity or clouding that develops in the crystalline lens of the eye or in its capsule.

Delayed eruption of teeth · Very frequent (99-80%)

Delayed tooth eruption, which can be defined as tooth eruption more than 2 SD beyond the mean eruption age.

Microcornea · Very frequent (99-80%)

A congenital abnormality of the cornea in which the cornea and the anterior segment of the eye are smaller than normal. The horizontal diameter of the cornea does not reach 10 mm even in adulthood.

Microphthalmia · Very frequent (99-80%)

A developmental anomaly characterized by abnormal smallness of one or both eyes.

2-3 toe syndactyly · Frequent (79-30%)

Syndactyly with fusion of toes two and three.

Other findings in the same source

From: Orphanet

Additional reported features include Abnormal palate morphology (Frequent (79-30%)); Broad palm (Frequent (79-30%)); Cleft palate (Frequent (79-30%)); Flexion contracture of the 2nd toe (Frequent (79-30%)); Flexion contracture of the 4th toe (Frequent (79-30%)); Fused teeth (Frequent (79-30%)); Hammertoe (Frequent (79-30%)); Long philtrum (Frequent (79-30%)); Narrow face (Frequent (79-30%)); Oligodontia (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 Oculofaciocardiodental 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 Oculofaciocardiodental 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.