Both sickle cell anaemia and Huntington's chorea are:

Explanation

A congenital disorder is a medical condition that is present at birth. Congenital disorders can be a result of genetic abnormalities, the intrauterine environment, or unknown factors. Sickle cell disease [a group of genetic disorders caused by sickle hemoglobin (HbS). HbS molecules tend to clump together, making red blood cells sticky, stiff, and more fragile and causing them to form into a curved, sickle shape] and Huntington's chorea (an inherited disorder characterized by degenerative changes in the basal ganglia structures, which ultimately result in a severely shrunken brain and enlarged ventricles, abnormal body movements called chorea and loss of memory) are congenital disorders.