Smith Lemli Opitz syndrome - Medtick

Smith Lemli Opitz syndrome

What is it?

Smith-Lemli-Opitz syndrome (SLOS) is a variable genetic disorder caused by the way one produce cholesterol in our bodies.

  • Cholesterol is a major component of cell membranes and helps form myelin, a substance which protects brain cells (neurons).
  • It also plays a significant role in proper digestion.
  • This condition cause a lack of cholesterol production and as a result it also allows toxic byproducts of cholesterol to build up within the body, which hinders development and growth in multiple bodily systems

  • The severity of SLOS varies greatly in affected individuals, even in the same family, and some have normal development and only minor birth defects.

National Organization for Rare Disorders Smith-Lemli-Opitz syndrome

Cause

  • Deficiency in the enzyme 7-dehydrocholesterol reductase that results in an abnormality in cholesterol metabolism.
  • It is an inherited as an autosomal recessive genetic disorder.
    • Family history autosomal recessive disorder (Both parents who are carriers of  the recessive genes responsible and can cause a 25% chance of their sibling getting this condition)
    • If both parents are carriers, a child has a 25 percent chance of inheriting two recessive genes (and getting this condition), a 50 percent chance of getting one dominant and one recessive gene (and becoming a carrier), and a 25 percent chance of getting two dominant genes (and remaining unaffected).
  • All individuals carry 4-5 abnormal genes. Parents who are close relatives (consanguineous) have a higher chance than unrelated parents to both carry the same abnormal gene, which increases the risk to have children with a recessive genetic disorder.

National Organization for Rare Disorders Smith-Lemli-Opitz syndrome

Symptoms

(Symptoms can vary from individual to individual)

Complications /Information to beware of/General tips:

Medical Emergency Condition

And/or do not wait, phone for an ambulance if have or develop:


This condition can lead to:


This condition may show similar symptoms to:


These conditions are very difficult to diagnose, a specialist opinion is required.

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Detailed Information

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