Classic Galactosemia is a genetic disorder that affects the body's ability to process galactose, a sugar found in milk and other dairy products. The word "Galactosemia" is pronounced /ɡəˌlæktoʊˈsiːmiə/ (guh-lak-toh-see-mee-uh) and is spelled using the standard English alphabet. The "ia" suffix is often used in medical terminology to indicate a condition or disease. Classic Galactosemia is distinguished from other types of Galactosemia by the severity of symptoms and the age of onset. It is important to diagnose and treat this disorder early in life to prevent potential complications.
Classic Galactosemia is a hereditary metabolic disorder characterized by the inability to metabolize galactose, a sugar found in milk and other dairy products. This condition is caused by a genetic defect affecting the GAL gene, which is responsible for the production of an enzyme called galactose-1-phosphate uridylyltransferase (GALT). Individuals with Classic Galactosemia lack this enzyme or have reduced activity, leading to the accumulation of galactose-1-phosphate in the body.
The build-up of galactose-1-phosphate causes various health problems including liver damage, kidney problems, and brain abnormalities. Symptoms of Classic Galactosemia often appear shortly after birth, when an affected infant is exposed to galactose through breast milk or formula. These symptoms may include jaundice, poor growth, feeding difficulties, vomiting, diarrhea, and lethargy.
If left untreated, Classic Galactosemia can lead to severe complications such as liver failure, intellectual disability, cataracts, and developmental delays. Therefore, early diagnosis through newborn screening and immediate initiation of a galactose-restricted diet are essential.
A lifelong strict galactose-free diet, with the exclusion of lactose and galactose-containing foods, is the primary treatment for Classic Galactosemia. Lactose substitutes and special formulas are often recommended to provide adequate nutrition. Regular monitoring and management of potential complications, such as nutritional deficiencies and long-term complications, are also essential to ensure the best possible outcomes for individuals with Classic Galactosemia.
The term "Classic Galactosemia" is composed of two parts: "Classic" and "Galactosemia".
The word "Classic" is derived from the Latin word "classicus", which means "first class" or "of the highest rank". In this context, "Classic Galactosemia" refers to the most severe and characteristic form of the genetic disorder called Galactosemia.
"Galactosemia" is a combination of two Greek words, "galaktos" meaning "milk", and "haima" meaning "blood". Galactosemia is a rare metabolic disorder in which the body cannot metabolize the sugar galactose properly, often leading to serious health complications.
Therefore, the term "Classic Galactosemia" essentially refers to the most severe and prototypical form of the disorder, where the body cannot adequately process galactose.