Description: Adrenoleukodystrophy (ALD), or commonly known as Lorenzo's Oil, is a rare genetic disorder that affects about 1/100,000 males around the world. It is characterized by the build up of very long chain fatty acids (VLCFAs) in the brain and the adrenal glands. These fatty acids strip the myelin off nerve fibers and lead to the degeneration of the adrenal glands. ALD is one of the leukodytrophies that cause damage to the myelin sheath, the fatty covering on nerve fibers in the brain. .
There are several forms of ALD. The classic childhood form, which is the most severe, only affects boys and may occur between the ages of 4 and 10, but can appear as early as 2 years of age. In the childhood form, affected children develop normally until about the age of three or four, and it progresses quickly from there. The milder adult-onset form, it typically begins between the ages of 21 and 35. Neonatal ALD affects both male and female newborns; this form is usually quickly progressive. .
Symptoms: Some of the symptoms of the childhood form include visual loss, learning disabilities, seizures, difficulty swallowing, deafness, fatigue and vomiting. The most common symptoms are abnormal withdrawal, aggression, poor memory and poor school performance. In the milder adult-onset form symptoms may include leg stiffness, progressive spastic paraparesis (stiffness, weakness and/or paralysis). Symptoms in the neonatal form can consist of mental retardation, facial abnormalities, seizures, retinal degeneration, low muscle tone and adrenal dysfunction. .
Cause Agent: There is no cause agent for ALD; it is inherited from the mother during pregnancy. All daughters of an affected male are carriers of the disease; none of his sons will be affected. A female who is a carrier has a 50% chance of transmitting it during pregnancy. Sons who inherit it will be affected, and the daughters will be carriers but not seriously affected by the disease.