What Is the Difference Between CSID and GSID?

Congenital Sucrase-Isomaltase Deficiency vs. Genetic Sucrase-Isomaltase Deficiency

The terms “Congenital Sucrase-Isomaltase Deficiency (CSID)” and “Genetic Sucrase-Isomaltase Deficiency (GSID)” are alike in every respect — both refer to the same disorder. The term “congenital” means present at birth, and most congenital disorders are discovered in infancy or early childhood. In recent years, more and more individuals are being diagnosed with CSID in their teens or adulthood. CSID shares the same symptoms as many other gastrointestinal disorders, so these patients may have been misdiagnosed because they were never tested specifically for CSID. Because the term “congenital” may imply an early childhood diagnosis, some may feel it more appropriate to call the condition “Genetic Sucrase-Isomaltase Deficiency” when diagnosed in older individuals. There is no implied age at the time of diagnosis with the name GSID, which may be diagnosed at any time — in infancy, childhood, in teenage years, or adulthood.

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