mosaic thrisomy18?

Answer 1

Instead of all every cell having a third chromosome 18, only a portion do. This still causes many abnormalities but does not always prove as fatal as Trisomy 18 throughout all cells.

Answer 2

Click the link for more info., but here is some info. specifically regarding mosaic variety of trisomy 18 (Edward's Syndrome):

Variations

A small percentage of cases occur when only some of the body's cells have an extra copy of chromosome 18, resulting in a mixed population of cells with a differing number of chromosomes. Such cases are sometimes called mosaic Edwards syndrome. Very rarely, a piece of chromosome 18 becomes attached to another chromosome (translocated) before or after conception. Affected people have two copies of chromosome 18, plus extra material from chromosome 18 attached to another chromosome. With a translocation, the person has a partial trisomy for chromosome 18 and the abnormalities are often less than for the typical Edwards syndrome.

Answer 3

mosaic TRISOMY 18 is a form of trisomy 18. the only difference is not every cell in the body is affected, it can be only certain cells that will have an extra 18 chromosome. Chances of survival are better when the trisomy 18 is determined to be mosaic. its also known as Edwards Syndrome. I had a friend who had a baby in march that was diagnosed with trisomy 18. She carried him to term and he was taken by C-Section, sadly he only lived about 4 1/2 hours. he had alot of birth defects which is the major problem with this disorder. Babies can be born with heart problems, kidney and brain tumors, spina bifida, the list is almost endless

Answer 4

Thrisomy 18 also known as Edwards syndrome

What is trisomy 18?
Trisomy 18, also called Edwards syndrome, is a chromosomal condition that is associated with low birth weight; a small, abnormally shaped head; a small jaw; a small mouth; and clenched fists with overlapping fingers. Infants born with trisomy 18 have mental retardation, heart defects, and organ abnormalities affecting most systems of the body. Affected individuals have an extremely high mortality rate; only 5 percent to 10 percent of infants born with trisomy 18 survive the first year of life.
How common is trisomy 18?
Trisomy 18 affects about 1 in 5,000 to 6,000 newborns. Approximately 80 percent of newborns affected by this disorder are female. The risk of having a child with trisomy 18 increases as a woman gets older.