Chromosomal Survey in 298 Normal Subjects and 1,253 Cases of Congenital Disorders during 1966-1970

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Abstract
Summary: A survey of chromosomal abnormalities has been carried out in Italy since 1966. Among the 1,551 subjects examined, the following abnormalities were found: 2 cases of C/C translocation, 1 of D/C, 5 of D/D, and 9 of D/G; 2 cases of Patau's syndrome with D trisomy; 4 cases of Edwards' syndrome; 176 cases of Down's syndrome, of which 163 with regular trisomy, 4 with mosaicism, 7 with D/G translocation, 1 with G/G translocation, and 1 with C/G translocation; 10 cases with 47,XXY complement; 1 case with 46,XY/47,XXY/48,XXXY mosaicism; 4 cases with 45,XO karyotype; 3 with 45,XO/46,XX, 1 with 45,XO/46,XY, 2 with 45,XO/46,XXr and 1 with 45,XO/46,XXi mosaicism; 2 cases with 47,XYY complement; 2 phenotypic females with 46, XY karyotype; and 5 leukaemic patients with Ph chromosome.Furthermore, several kinds of normal variants were observed, such as no. 9 prominent secondary constriction, chromosome-D or -G enlarged short arm, 16-pair heteromorphism, Y-chromosome polymorphism, and satellited E chromosome.

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