Definition:

Transaldolase (TALDO) deficiency is an inborn error of the pentose phosphate pathway (PPP), presenting primarily with liver disease and variable clinical course. TALDO is one of the key enzymes in the PPP. The severity of the symptoms can vary, ranging from fetal hydrops to slowly progressive liver cirrhosis, but patients show common symptoms like hydrops fetalis, dysmorphic features, liver dysfunction (cirrhosis), hemolytic anemia with renal involvement, and heart problems. The biochemical profile indicates an elevated level of erythritol, arabitol, ribitol, sedoheptitol, perseitol, sedoheptulose, mannoheptulose, and sedoheptulose-7P. The disorder is caused by mutations in the TALDO gene.