Harlequin

Harlequin is a term used in various fields of study, including medicine, genetics, and dermatology. In the medical field, it is often associated with a rare and severe skin condition known as Harlequin Ichthyosis.

Overview

Harlequin Ichthyosis is a severe genetic disorder that mainly affects the skin. Infants with this condition are born with very hard, thick skin covering most of their bodies. The skin forms large, diamond-shaped plates that are separated by deep cracks (fissures). These skin abnormalities affect the shape of the eyelids, nose, mouth, and ears, and limit movement of the arms and legs. Restricted movement of the chest can lead to breathing difficulties and respiratory failure.

Causes

Harlequin Ichthyosis is caused by mutations in the ABCA12 gene. The ABCA12 gene provides instructions for making a protein that is essential for normal skin development. This protein plays a major role in transporting fats (lipids) in the outermost layer of skin (the epidermis). Mutations in the ABCA12 gene disrupt the normal development of the epidermis, leading to the hard, thick scales seen in people with harlequin ichthyosis.

Treatment

Treatment for Harlequin Ichthyosis is supportive and aims to manage the symptoms and complications. This may include intensive care and isolation to prevent infection, use of retinoids to promote shedding of the skin, and various therapies to manage associated complications.

See Also

• Ichthyosis
• Genetic Disorders
• Dermatology

References

Harlequin Resources
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