Medical Dictionary Definitions A-Z List
Medical Dictionary Definitions A - Z - «C»:
Chromosome, X: The sex chromosome found twice in normal
females and once, along with a Y chromosome, in normal males. The complete chromosome complement consisting of 46 chromosomes
including the two sex chromosomes is conventionally
written as 46,XX for females and 46,XY for males.
The X chro...
Chromosome, Y: See: Y chromosome...
Chromosomes: The microscopically visible carriers of the genetic material. They are composed of deoxyribonucleic acid (DNA) and proteins and, under a microscope, look like little rods.
Humans normally have 46 chromosomes -- 44 autosomes (nonsex chromosomes) plus XX sex chromosomes in the case of th...
Chromosomes in multiple miscarriages
Chromosomes in multiple miscarriages: Couples who have
had more than one miscarriage (spontaneous abortion) have about a 5% chance that one
member of the couple is carrying a chromosome translocation responsible for the
Chronic: This important term in medicine comes from the Greek chronos, time and means lasting a long
A chronic condition is one lasting 3 months or more, by the definition of the U.S.
National Center for Health Statistics. In ancient Greece, the "father of
medicine" Hippocrates dist...
Chronic arthritis, systemic-onset juvenile
Chronic arthritis, systemic-onset juvenile: See: Arthritis, systemic-onset juvenile rheumatoid....
Chronic bacterial prostatitis
Chronic bacterial prostatitis: Longstanding bacterial
infection of the prostate gland superimposed on a defect in the
prostate. (The prostate is a small organ below the bladder which
surrounds the urethra, the tube that carries urine down from the
bladder.) The symptoms can include low back pai...
Chronic bronchitis: Defined clinically as a daily cough with production of sputum for 3 months, two years in a row.
In chronic bronchitis, there is inflammation and swelling of the lining of the airways that lead to narrowing and obstruction of the airways. The inflammation stimulates production of...
Chronic daily headache
Chronic daily headache: See: Headache, chronic daily....
Chronic disease: A disease that persists for a long time. A chronic
disease is one lasting 3 months or more, by the definition of the U.S. National
Center for Health Statistics. Chronic diseases generally cannot be prevented by
vaccines or cured by medication, nor do they just disappear. Eighty-eigh...
Chronic fatigue syndrome
Chronic fatigue syndrome: A debilitating and complex disorder characterized by profound fatigue of six months or longer duration that is not improved by bed rest and that may be worsened by physical or mental activity. Persons with chronic fatigue syndrome (CFS) most often function at a substantiall...
Chronic granulocytic leukemia
Chronic granulocytic leukemia: See: Chronic myelogenous leukemia....
Chronic illness: An illness that persists for a
long period of time. The term "chronic" comes from the Greek chronos, time and means lasting a long
A chronic illness is one lasting 3 months or more, by the definition of the U.S.
National Center for Health Statistics. In ancient Greece, the "f...
Chronic insomnia: See Insomnia, chronic....
Chronic kidney failure
Chronic kidney failure: See: Chronic renal failure....