Short-arm deletion of an X chromosome (45,XO/46,XX p--)

Cytogenetic evaluation of patients with clinical spectrum of Turner syndrome

AIM:

The objective of this study was to correlate the genotype, of female patients, withshort stature and primary amenorrhea.

MATERIALS AND METHODS:

One hundred and forty-six subjects were recruited during 2005-2012. Microscopic and automated karyotyping analyses were done by using chromosomes isolated from the lymphocytes using Giemsa banding (GTG) to identify chromosome abnormalities.

RESULTS:

A total of 146 clinically suspected Turner syndrome (TS) subjects were recruited for the study, of which, 61 patients were identified to have chromosome abnormalities. The chromosomal abnormalities detected were as follows: Monosomy X (n = 19, 13.01%), triple X syndrome (n = 4, 2.7%), mosaic TS (n = 12, 8.21%), XY gonadal dysgenesis (n = 13, 8.9%), and structural abnormalities including X chromosome (n = 15, 10.27%) and one patient each with autosomal changes involving 9qh inversion and translocation of chromosomes 12 and 14.

CONCLUSION:

Karyotype abnormalities accounting for 46% in this study emphasize the need for karyotype testing in cases of short stature with primary amenorrhea.

Partial short arm deletions of the X chromosome and spontaneous pubertal development in girls with short stature

Five additional examples of partial deletion of the short arm of the X chromosome are reported. All of the patients had short stature. The presence of the other stigmata of Turner syndrome, including ovarian dysfunction, appeared to depend on the location of the deletion. Chromosomal analysis of girls with short stature (less than 140 cm), normal pubertal development, and regular menses may reveal that minor deletions of the short arm of the X chromosome are more frequent than has been previously reported.