Pericentric inversion 9
46,XY,inv(9)(p11q13)
Also known as: inv(9), inversion 9 variant
46,XY,inv(9)(p11q13) is a pericentric inversion of chromosome 9. It is one of the most common structural variants in the human genome and is generally considered a benign finding.
Open in the interactive visualizer →
inv(9)
9
What the notation means
46- total chromosome count (the normal human number)
XY- sex chromosomes: one X, one Y (usual male karyotype)
inv(9)(p11q13)- an INVERSION in chromosome 9: the segment between 9p11 and 9q13 is flipped end-for-end (pericentric, it spans the centromere)