Compound heterozygous sickling disorders without crisis

**Definition:** A disease caused by genetic inheritance of two heterozygous recessive alleles of the haemoglobin gene leading to abnormal formation of haemoglobin molecule. This disease is characterised by rigid, sickle shaped red blood cells. Confirmation is by identification of mutations through genetic testing.

**Inclusions:** - Sickle cell Hb-C disease without crisis - Sickle cell thalassaemia without crisis