Abstract
We present a case of a Caucasian multigravida with advanced maternal age who showed evidence of an unusual heterochromatin banding pattern on chromosome 9 and a similar fetal karyotype on amniocentesis. Although unusual banding patterns of this region have been described earlier, we report a new, clinically insignificant pattern. This case illustrates the care needed in analysing the heterochromatin region for accurate clinical interpretation of chromosome 9 polymorphisms.
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References
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Tonk, V., Krishna, J. A report of a rare chromosome 9 variant with an unusual G-banding pattern in the 9qh region. Indian J Pediatr 64, 111–113 (1997). https://doi.org/10.1007/BF02795790
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DOI: https://doi.org/10.1007/BF02795790