This genetic disorder, known as Harlequin’s pteropathy, is among the rarest and most severe that health professionals encounter. While it only affects a small number of newborns in the U.S. each year, the condition is characterized by a hard, armor-like layer of scales present at birth.
Historically viewed as a death sentence, advancements in medicine have allowed some affected children to reach adulthood, which is a remarkable shift. There’s a lot to unravel about such unusual and serious health issues.
What is Harlequin Fish Bodies?
This condition represents the most extreme type within a group of over twenty skin disorders. It impairs how the body generates and sheds skin cells. A baby born with Harlequin Uoshima typically has a coating of thick, tough skin that splits and cracks painfully.
The intense tension in the skin can cause anatomical deformities, such as turned eyelids and lips. Additionally, the breast may contract, complicating breathing. Interestingly, while infants in this condition may seem to lack ears, these are usually still there, just fused to the head with thick skin. Symptoms also include hearing issues, limited mobility in joints, and swollen, small hands and feet.
What causes it?
Harlequin vesicular disease arises from rare genetic mutations. For a child to be affected, both parents must pass on one copy of the faulty gene.
This gene, known as ABCA12, is crucial for producing proteins that promote healthy skin development. It facilitates the movement of fats into the outer layer of the skin, creating a protective barrier. When this gene malfunctions, the resulting issues mirror those seen in Harlequin Uoshima.
How rare is that?
Harlequin’s pteropathy impacts roughly one in every half a million births, equating to about seven infants annually in the U.S. This condition is equally prevalent among males and females, although there’s a noted lower occurrence in certain racial or ethnic groups.
Is it fatal?
In previous decades, infants with this condition often did not survive beyond the neonatal phase. However, current medical technology has enabled some children to live into their teenage and adult years.
Nonetheless, the condition remains perilous. The compromised skin barrier makes it challenging for infants to maintain fluid levels, regulate temperature, and combat infections, leading to significant risks including dehydration and respiratory failure.
How is it treated?
Upon birth, infants diagnosed with Harlequin Uoshima are swiftly transported to a neonatal intensive care unit. They are kept in high-humidity incubators to help manage body temperature.
Nurses frequently soak and treat the skin to soften it, applying moisturizers to enhance flexibility and combat dryness. In more severe instances, medication known as etretinate may be prescribed to address the thickened skin, although it must be used cautiously due to potential long-term side effects.
As children progress beyond the critical newborn phase, the thick plates eventually reduce, though the skin often remains red and scaly, necessitating ongoing medical attention.
