An Overview On Sickle Cell Anaemia

Abstract

A condition known as sickle cell anaemia (SCA) is brought on by the creation of aberrant haemoglobin. This faulty haemoglobin links to other defective haemoglobin molecules inside the red blood cell, causing the cell to rigidly deform. This deformity makes it difficult for the cell to move via tiny vascular channels, which may lead to sludging and congestion of the vascular beds and tissue ischemia and infarction. The earliest clinical symptom of SCA, the acute pain crisis, which is assumed to be caused by marrow infarction, is caused by infarction, which is widespread throughout the body in SCA patients. Such injuries eventually lead to epiphyseal osteonecrosis and medullary bone infarcts. White matter and grey matter infarcts are observed in the brain, which lead to cognitive dysfunction and functional neurologic impairments. Common lung complications include infarcts, emboli (from marrow infarcts and fat necrosis), and a significantly higher risk of pneumonia. Infarction can occur in the kidney, liver, and spleen as well. Sequestration syndrome, a rare but potentially fatal consequence of SCA, occurs when a sizable portion of the intravascular volume is concentrated in one organ (often the spleen), leading to vascular collapse.