Health A-Z

Sickle Cell Disease

Clinical Definition Sickle cell disease is a group of hereditary disorders of erythrocytes, typically diagnosed in neonates with a blood test. Homozygous and compound heterozygous individuals have symptomatic disease, while heterozygous individuals have sickle cell trait, a generally benign condition. SCD is characterized by anemia, pain, potentially life-threatening complications such as bacterial septicemia, acute chest

Sigmoid Colon

Clinical Definition Sigmoid colon is the section of the colon that leads to the rectum and anus. It makes an S-shaped curve. The colon’s other segments are the cecum, ascending colon, transverse colon, and descending colon, with the entire length typically about six feet. In Our Own Words The sigmoid colon is the part of


Clinical Definition Sinusitis is an infection or inflammation of the mucus membranes of the sinuses. Swelling of the membranes can obstruct normal drainage, which can lead to the growth of bacteria and development of an infection. Sinusitis may be allergic, bacterial, viral, and/or may involve structural abnormalities. Clinical presentation of acute sinusitis usually includes headache,

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