Xie X, Li F, Tan W, Tang J. Analysis of the clinical features of pericentric inversion of chromosome 9.
J Int Med Res 2021;
48:300060520957820. [PMID:
32957812 PMCID:
PMC7513406 DOI:
10.1177/0300060520957820]
[Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022] Open
Abstract
Objective
The pericentric inversion of chromosome 9 (inv9) is one of the most common
structural balanced chromosomal variations, and it is considered to be a
normal population variant. The aim of this study was to re-evaluate the
clinical impact of patients with inv9.
Methods
We studied the karyotypes from 4853 patients at a single center and
retrospectively reviewed their clinical data.
Results
There were 67 inv9 patients among 2988 adults, and 62 of them showed
different clinical features, including male and female infertility,
oligoasthenozoospermia, and azoospermia. Thirty-one cases of inv9 were found
in 1865 fetuses, including two cases in chorionic villus (6.90%) and 29 in
amniotic fluid (1.67%), but there were no cases in umbilical cord blood. The
rates of fetal phenotype abnormal and adverse pregnancy outcome with inv9 in
the chorionic villus were 100.00% (2/2), while only 17.24% (5/29) in the
amniotic fluid showed abnormalities, among which 60.00% (3/5) had adverse
pregnancy outcomes.
Conclusions
Although there is no clear evidence that inv9 is pathogenic, the genetic
counseling on inv9 in early pregnancy and adults needs to be given more
attention.
Collapse