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Ring chromosome 18 syndrome is a rare condition in which one or both ends of
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Ring chromosome 20 syndrome — Ring chromosome 20, ring shaped chromosome 20 or r(20) syndrome is a rare human chromosome abnormality where the two arms of chromosome 20 fuse to form a ring chromosome. The syndrome is associated with epileptic seizures, behaviour disorders and … Wikipedia
Ring chromosome — A ring chromosome is a chromosome whose arms have fused together to form a ring. A ring chromosome is denoted by the symbol r. Ring chromosomes may form in cells following genetic damage by mutagens like radiation, they may also arise… … Wikipedia
Chromosome 7 (human) — Chromosome 7 is one of the 23 pairs of chromosomes in humans. People normally have two copies of this chromosome. Chromosome 7 spans more than 158 million base pairs (the building material of DNA) and represents between 5 and 5.5 percent of the… … Wikipedia
Chromosome 5 (human) — Chromosome 5 is one of the 23 pairs of chromosomes in humans. People normally have two copies of this chromosome. Chromosome 5 spans about 181 million base pairs (the building blocks of DNA) and represents almost 6% of the total DNA in cells.… … Wikipedia
Chromosome 21 (human) — Chromosome 21 is one of the 23 pairs of chromosomes in humans. People normally have two copies of this chromosome. The trisomy of the 21st chromosome causes Down Syndrome. Chromosome 21 is the smallest human chromosome, 47 million nucleotides… … Wikipedia
Chromosome 22 (human) — Chromosome 22 is one of the 23 pairs of chromosomes in human cells. Humans normally have two copies of Chromosome 22 in each cell. Chromosome 22 is the second smallest human chromosome, spanning about 49 million DNA base pairs and representing… … Wikipedia
Chromosome 20 en anneau — Syndrome du chromosome 20 en anneau Chromosome 20 en anneau et chromosome 20 normal chez un porteur hétérozygote Transmission Sporadique Chromosome 20 … Wikipédia en Français
Chromosome abnormality — The three major single chromosome mutations; deletion (1), duplication (2) and inversion (3) … Wikipedia
Syndrome, Down — A common chromosome disorder due to an extra chromosome number 21 (trisomy 21). Down syndrome causes mental retardation, a characteristic face, and multiple malformations. Down syndrome is a relatively common birth defect. The chromosome… … Medical dictionary
Syndrome, trisomy 21 — A common chromosome disorder, often called Down syndrome, due to an extra chromosome number 21 (trisomy 21). The chromosome abnormality affects both the physical and intellectual development of the individual. Trisome 21 (Down) syndrome is… … Medical dictionary
