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letter
. 2016 Dec 21;25(3):273–274. doi: 10.1038/ejhg.2016.177

Figure 1.

Figure 1

The idic(Y)(q11.?21) chromosome from a male with hypogonadism that was mistaken by ~30% of participating laboratories for a normal Y chromosome. The karyotype was 46,X,idic(Y)(q11.?12)[17/]/45,X[13].ish idic(Y)(SRY++).nuc ish(DYZ3x2)[60/100],(DYZ1x0)[200]. (a) Representative idic(Y) chromosomes, each from a different metaphase. The dashed line represents the axis of symmetry. (b) For comparison, a structurally normal Y chromosome is shown. The dashed line is at the position of the centromere.