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Sickle cell test. A urologist might request this test for men with a higher risk of sickle cell disease. Duplex ultrasound. Sometimes called ultrasonography, this can measure blood flow in your ...
For example, sickle-cell anemia is a human genetic disease that results from a single base difference within the coding region for the β-globin section of hemoglobin, causing a single amino acid change that changes hemoglobin's physical properties. [78]
By way of analogy, the allele (a particular version of a gene) which causes sickle cell disease when two copies are present, also confers an adaptive advantage when one copy is present by providing resistance to malaria with non-symptomatic sickle cell trait—which is known as "heterozygote advantage". [96]
Psoriasis is a long-lasting, noncontagious autoimmune disease characterized by patches of abnormal skin. [4][5] These areas are red, pink, or purple, dry, itchy, and scaly. [8][3] Psoriasis varies in severity from small localized patches to complete body coverage. [3] Injury to the skin can trigger psoriatic skin changes at that spot, which is ...
Trisomy 21. Down syndrome (also known by the karyotype 47,XX,+21 for females and 47,XY,+21 for males) [98] is mostly caused by a failure of the 21st chromosome to separate during egg or sperm development, known as nondisjunction. [91] As a result, a sperm or egg cell is produced with an extra copy of chromosome 21; this cell thus has 24 ...
The disease affects how oxygen is delivered to the red blood cells and is often diagnosed at a young age, discovered through a diagnosis of anemia. In a 2019 study on racial discrimination and dental health in the U.S. the authors found that the "emotional impact of racial discrimination" results in fewer visits to a dentist. [49]
Parkinson's disease (PD), or simply Parkinson's, is a neurodegenerative disease of mainly the central nervous system that affects both the motor and non-motor systems of the body. The symptoms usually emerge slowly, and, as the disease progresses, non-motor symptoms become more common. Usual symptoms include tremors, slowness of movement ...
The most common cell type exhibited by renal cell carcinoma is the clear cell, which is named by the dissolving of the cells' high lipid content in the cytoplasm. The clear cells are thought to be the least likely to spread and usually respond more favourably to treatment.