Drugs Information Online
Drugs and diseases reference index

Drugs and diseases reference index
Search
EN

Medical Dictionary Definitions A-Z List

Medical Dictionary Definitions A - Z - «P»:

  1. Polycyclic aromatic hydrocarbon Polycyclic aromatic hydrocarbon
    Polycyclic aromatic hydrocarbon: Abbreviated PAH. A hydrocarbon (a molecule made up of hydrogen and carbon) containing two or more closed rings of atoms. PAHs are persistent, bioaccumulative, and toxic (PBT) pollutant. Exposure usually occurs by breathing air contaminated by wild fires or coal tar, ...
  2. Polycystic kidney disease Polycystic kidney disease
    Polycystic kidney disease: One of the genetic disorders characterized by the development of innumerable cysts in the kidneys. These cysts are filled with fluid, and replace much of the mass of the kidneys. This reduces kidney function, leading to kidney failure. There are two major genetic forms o...
  3. Polycystic kidney disease, adult Polycystic kidney disease, adult
    Polycystic kidney disease, adult: See: Polycystic kidney disease, autosomal dominant ....
  4. Polycystic kidney disease, autosomal dominant Polycystic kidney disease, autosomal dominant
    Polycystic kidney disease, autosomal dominant: A late onset disorder characterized by the progressive development of innumerable cysts in the kidney, causing hypertension, renal pain, and renal insufficiency (kidney failure). This is a systemic disease. There are cysts in other organs such as the...
  5. Polycystic kidney disease, autosomal recessive Polycystic kidney disease, autosomal recessive
    Polycystic kidney disease, autosomal recessive: An early onset disorder characterized by the presence of innumerable cysts in the kidney and enlarged kidneys that can usually be detected before birth (by ultrasound) or in the neonatal period. A minority of cases are diagnosed later in childhood....
  6. Polycystic kidney disease, infantile Polycystic kidney disease, infantile
    Polycystic kidney disease, infantile: See: Polycystic kidney disease, autosomal recessive....
  7. Polycystic ovarian syndrome Polycystic ovarian syndrome
    Polycystic ovarian syndrome: Abbreviated PCOS. Polycystic ovarian syndrome is a condition in women characterized by irregular or no menstrual periods, acne, obesity, and excess hair growth. PCOS is a disorder of chronically abnormal ovarian function and hyperandrogenism (abnormally elevated androg...
  8. Polycystic ovary syndrome Polycystic ovary syndrome
    Polycystic ovary syndrome: Abbreviated PCOS. Polcystic ovary syndrome is a condition in women characterized by irregular or no menstrual periods, acne, obesity, and excess hair growth. PCOS is a disorder of chronically abnormal ovarian function and hyperandrogenism (abnormally elevated androgen lev...
  9. Polycythemia Polycythemia
    Polycythemia: Too many red blood cells. The opposite of anemia. polycythemia formally exists when the hemoglobin, red blood cell (RBC) count, and total RBC volume are all above normal....
  10. Polycythemia vera (PV) Polycythemia vera (PV)
    Polycythemia vera (PV): Overproduction (proliferation) of red blood cells due to bone marrow disease (myeloproferative disorder). PV tends to evolve into acute leukemia or a condition with the marrow replaced by scar tissue (myelofibrosis). To have PV, there must be polycythemia which formally ex...
  11. Polydactyly Polydactyly
    Polydactyly: More than the normal number of fingers or toes. From the Greek "polys" (many) + "dactylos" (finger) = many fingers or, medically, too many fingers. Polydactyly is the opposite of oligodactyly (too few fingers or toes)....
  12. Polydactyly (hexadactyly) Polydactyly (hexadactyly)
    Polydactyly (hexadactyly): The presence of an extra, sixth finger or toe, a very common congenital malformation (birth defect). This is called hexadactyly. The word hexadactyly literally means six digits. In medical usage, hexadactyly does not specify whether the six digits are fingers or toes (a...
  13. Polydipsia Polydipsia
    Polydipsia: Excessive thirst all the time. Polydipsia occurs, for example, in untreated or poorly controlled diabetes mellitus. ...
  14. Polyendocrinopathy syndrome, autoimmune Polyendocrinopathy syndrome, autoimmune
    Polyendocrinopathy syndrome, autoimmune: A genetic autoimmune disease with an extraordinary array of clinical features but characterized most often by at least 2 of the following 3 findings: hypoparathyroidism -- underfunction of the parathyroid glands which control calcium, candidiasis (yeast infe...
  15. Polygenic Polygenic
    Polygenic: Pertaining to two or more genes. As opposed to monogenic. Eye color is polygenic. It is by determined by a number of genes. ...