Among Turnersyndrome cases 6.6% carry an sSMC {308}
Cases with Yqh- like reported as sSMC in {328} are not included here. 

sSMC derived from X-chromosome	sSMC derived from Y-chromosome
phenotype male (mY)
ring shape sSMC(Y)	inv dup shape sSMC(Y)
centric minute shape sSMC(Y)	undefined shape sSMC(Y)
phenotype female (fY)
ring shape sSMC(Y)	inv dup shape sSMC(Y)
centric minute shape sSMC(Y)	undefined shape sSMC(Y)
sSMC derived from chromosome ?	DISCLAIMER

References

In general 70% of sSMC carriers are clinically normal. The figures listed here
are based on the bias, that mainly clinically aberrant cases are studied and reported in literature!
Also cases with multiple sSMC are more likely to lead to clinical aberrations than cases with one sSMC.


Specific abbreviations used on this sub-page:

ab = ascertained (long) before puberty
fd = fetal death
inf = infertile
n.a. = not available
top = termination of pregnancy