Ring chromosome 13
46,XY,r(13)(p11q34)
Also known as: r(13), ring 13
46,XY,r(13)(p11q34) is a ring chromosome 13, formed when both arms of chromosome 13 break and the broken ends fuse into a circle. Ring chromosomes are unstable through cell division.
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What the notation means
46count,XYsex chromosomes,r(13)(p11q34)abnormality
The shape of this abnormality
rsymbol(13)chromosomes(p11q34)breakpoints
- (13)
- one chromosome, so one group of breakpoints follows.
- (p11q34)
- the two bands where the ends joined; the tips beyond them are lost.
- count · sex chromosomes
- a normal count and the usual male sex chromosomes
- abnormality
- a RING chromosome r(13): the chromosome's arms break and the broken ends fuse into a circle (usually loses the distal tips)