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A case of an infertile male with a small supernumerary marker chromosome negative for M-FISH and containing only heterochromatin

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Abstract

Aim

To describe the case of a 32-year-old infertile male with small supernumerary marker chromosome (sSMCs) in 80% of peripheral lymphocytes.

Methods

G-banding, C-banding, STRP analysis, M-FISH and molecule diagnosis of Y-chromosomal microdeletions were performed to determine the origin of sSMCs.

Results

The karyotype of this patient was established as 47, XY, +mar/46, XY. C-banding showed that the marker chromosome was composed of heterochromatin without visible euchromatic material. No positive result was obtained in STRP, M-FISH and the microdeletion analysis of Y- chromosome.

Conclusions

The small supernumerary marker chromosome could play a causative role in male infertility although the mechanism remains to be elucidated.

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Acknowledgments

We are grateful to Dr. Yimei Fan and Dr. Huimei Chen for their valuable advice on preparing the manuscript. This work is supported by grants from Jiangsu Health Department (Grant number: H2006), China.

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Correspondence to Ya-ping Wang.

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Capsule

We report a case of an infertile male with heterochromatic sSMCs, and analyze the relationship between infertility and heterochromatic sSMCs.

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Wang, W., Hu, Y., Zhu, H. et al. A case of an infertile male with a small supernumerary marker chromosome negative for M-FISH and containing only heterochromatin. J Assist Reprod Genet 26, 291–295 (2009). https://doi.org/10.1007/s10815-009-9310-1

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  • DOI: https://doi.org/10.1007/s10815-009-9310-1

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