Cardiofaciocutaneous Syndrome- Causes, Signs, Diagnosis and Treatment

Introduction:

Cardiofaciocutaneous syndrome is an infrequent condition with unknown incidence. It has been researched and estimated that only around 200 to 300 individuals worldwide are affected by this syndrome. Cardiofaciocutaneous syndrome is a condition that mostly affects the skin and hair (cutaneous), the heart (cardio-), and the facial characteristics (facial-). In addition to delayed development, people with this syndrome typically have moderate to severe intellectual disabilities.

What Are the Causes of Cardiofaciocutaneous Syndrome?

Both males and females are equally affected by this syndrome. Mutations in one or more genes are one of the causes of cardiofaciocutaneous syndrome. The most common gene that gets mutated, leading to this syndrome, is the B-Raf proto-oncogene. The function of this gene is to form a protein that transfers correct chemical signals from one cell to another. The included protein is crucial in sending signals within the body’s cells and tissues.

Some functions of this protein are cell growth, cell formation, cell movement, and cell destruction. As mentioned above, a mutation in this gene will eventually lead to alterations in all aspects of the protein's function. Mutations in other genes can also result in the development of cardiofaciocutaneous syndrome. These genes include mitogen-activated protein kinase (MAP2K) and Ki-ras2 Kirsten rat sarcoma viral oncogene (KRAS).

What Is the Inheritance of the Syndrome?

Cardiofaciocutaneous syndrome is thought to be an autosomal dominant disorder, meaning that the disorder can be caused by one mutated copy of a gene in each cell. Cardiofaciocutaneous syndrome typically arises from novel gene variations and affects individuals without a family history. Affected individuals have occasionally been reported to have inherited the illness from an afflicted parent. There is a low chance that the affected sibling will develop this syndrome. There is a 50 percent chance of this syndrome getting passed on to the child from a pregnant mother with cardiofaciocutaneous syndrome.

What Happens in the Cardiofaciocutaneous (CFC) Syndrome?

The etiology of CFC syndrome is a genetic alteration or mutation. Numerous cell changes occur in the fetus throughout pregnancy:

• Early (stem) cells develop into specialized cells that perform particular functions.

• Cells travel throughout the body and proliferate.

• As bodily parts gain shape, some cells divide, while others self-destruct.

Cells can communicate with one another through a route, for example. The RAS pathway aids in regulating cell division. When the pathway's linkages function as they must, the fetus's body parts expand and grow in ways that enable the kid to flourish.

Certain signals in a youngster with CFC syndrome are hyperactive. This causes difficulties by altering the way cells grow and function. Although CFC syndrome is a hereditary condition, it is hardly ever inherited. Usually, the alteration in the child's DNA (deoxyribonucleic acid) is "unpredictable." This indicates that the youngster has the illness while the parents are well. It is known as a novel mutation.

What Are the Clinical Features of Cardiofaciocutaneous Syndrome?

Heart imperfection and deformity are some of the classical signs of this syndrome. The heart valves remain impaired, leading to abnormal blood flow to the lungs, reduced cardiac output, hollow passages between the heart's four chambers, holes in the valves, and a weak and malformed heart. These are some of the cardiac manifestations of cardiofaciocutaneous syndrome.

There are also outstanding facial features of this syndrome, such as:

• High forehead.

• Narrow temples.

• A short nose.

• Wide space between the eyes.

• Slanting eye corners face down.

• Tiny chin.

• Droopy eyelids.

• Low-leveled ears.

• No eyelashes or eyebrows.

• Box-like face.

There are other characteristic lesions and malformations of the skin that include:

• Coarse, textured skin.

• Dark-colored mole.

• Rough skin.

• Wrinkled palms and soles of the feet.

• Bumpy skin on the hands and legs.

• Thin, sparse, and curly hair.

• Flat nails.

Other clinical features of cardiofaciocutaneous syndrome include the following:

• The weak tone of the skeletal muscles.

• Difficulty in weight gain.

• Difficulty in normal vision.

• Episodes of seizures.

• Short growth and stature.

• Abnormal shape of the upper and lower body.

• Puberty is hitting earlier than normal.

• Gastrointestinal issues are due to the wrong development of the intestines.

• Malnutrition and fatty liver.

• Astigmatism.

• An intellectual disability that is moderate.

What Are the Other Disorders Similar to Cardiofaciocutaneous Syndrome?

The following conditions may present with symptoms resembling those of cardiofaciocutaneous syndrome.

• Another RASopathy is Noonan syndrome, a prevalent genetic condition that affects approximately one in 2500 people. Characteristics include webbing of the neck, small stature, distinctive deformities of the chest, congenital heart problems, and other anomalies that resemble the unusual facial appearance of children with CFC syndrome.

• Another RASopathy connected to CFC and Noonan syndromes is Costello syndrome. This extremely rare inheritable condition is signified by a unique facial appearance, excessively loose skin on the neck, palms, fingers, and soles of the feet, and an intellectual impairment. It also causes growth delay after birth, which results in short stature.

How to Diagnose Cardiofaciocutaneous Syndrome?

In the majority of cases, cardiofaciocutaneous syndrome is diagnosed during infancy. This diagnosis is based on rigorous clinical examination, physical evaluation, and peculiar genetic testing. Cardiac severity can be determined by studying the heart's structure of the affected individual. Abnormal heart sounds or heart murmurs can be distinguished using a simple stethoscope. Electrocardiography, cardiac catheterization, and X-rays can reveal abnormalities present in the heart’s structure.

The motions and functions of the heart are studied for accurate diagnosis. MRI (magnetic resonance imaging) of the brain can be done to detect any changes in the structure. Tests for every aspect of the body can be carried out.

For instance, an endocrine evaluation is conducted for hormonal abnormalities, an ophthalmic checkup for visual impairment, an audiological examination for hearing loss, and dermatological consultation and nutrition abnormalities can also be checked. Overall, a comprehensive and complete physical inspection is done.

How to Treat Cardiofaciocutaneous Syndrome?

The standard treatment for cardiofaciocutaneous syndrome is directed to specific signs and symptoms that are visible clinically. Since multiple organs and aspects of the body get affected, a multidisciplinary approach is a prerequisite. Healthcare professionals such as dermatologists, endocrinologists, neurosurgeons, cardiologists, etc, may devise a complete and systematic line of treatment.

Therapeutic management may also support some symptoms. Deciding on surgical intervention depends on many factors, such as the complications caused by cardiofaciocutaneous syndrome, its severity, location, and associated abnormalities.

Nevertheless, some clinical features need to be addressed immediately. Breathing problems, abnormalities of the heart's functioning, digestive concerns, and severe endocrine malfunctioning are some of the aspects that need to be considered for urgent treatment because they have the potential to be fatal or at least damage some organs, leading to a lifetime of regret. This will eventually reduce the quality of life.

Conclusion

Cardiofaciocutaneous syndrome is a congenital multiple-organ condition that affects mainly the heart. It is a result of a gene mutation. The mutated gene harms the protein, which signals the cells for various growth parameters. Cardiofaciocutaneous syndrome affects the heart, causing malfunctioning of the cardiovascular system.

It also alters the functioning of the endocrine system, connective tissue system, neurological system, and other systems. Heart defects can rarely be fatal but need to be addressed to avoid future complications. Surgical management is not the go-to method of management. Instead, symptomatic therapy is the ideal treatment plan carried out by professionals from different specialties. There is also evidence that paternal age can have an effect to some extent on the genetic alteration of the child. There have been advances in recent years to diagnose and manage this cardiofaciocutaneous syndrome with great success.