Table 2 Review of the cytogenetic analyses for published cases of discordant trisomy 21
study | case number | karyotype | |
|---|---|---|---|
twin 1 | twin 2 | ||
Shapiro LR et al. 1972 [12] | 2 | 47, XY,+21 | 47, XY,+ 21 |
47, XY,+ 21 | 46 XX | ||
Rogers JG et al. 1982 [13] | 1 | 47,XY, +21 | 46 XY |
Beattie RB et al. 1993 [14] | 1 | 47,XY,+21 | 47,XY,+21 |
Nieuwint A et al. 1999 [15] | 2 | 47,XY, +21 | 46,XY |
45,X/46,XY | 45,X | ||
O’Donnell CP et al. 2004 [16] | 1 | 47,XY, +21 | 46,XY |
Cheng P-J et al. 2006 [17] | 1 | 45,XY,-21 | 46 XY |
Lewi L et al. 2006 [18] | 2 | 46,XX/45,X | 46,XX |
46,XY/45,X | 46,XY | ||
Dahoun S et al. 2008 [19] | 1 | 47,XX,+ 21 | 47,XX,+ 21/46,XX |
Choi SA et al. 2013 [20] | 1 | 47,XX,+ 21/46,XX | 46 XX |
Macatangga M et al. 2016 [21] | 1 | 47XY + 21/46XY | 47XY + 21/46XY |
Chang Y-L et al. 2017 [11] | 1 | 47, XY, + 21 | 46, XY |