Abstract
This study investigated the underlying chromosomal abnormalities of testicular failure using molecular cytogenetic analysis. We report 2 cases of rare genetic anomalies that resulted in hypogonadism. The first patient presented with severe hypogonadism. Chromosome analysis revealed a mosaic 46,X,r(Y) (p11.3q11.23)/45,X karyotype, with a ring Y chromosome. A Y chromosome microdeletion assay showed a deletion in the azoospermia factor a region. The second patient presented with infertility and nonobstructive azoospermia. Cytogenetic and fluorescent in situ hybridization analysis revealed a 47,XY,+mar.ish i(15) (D15Z1++,SNRPN2,PML2) karyotype, with a small supernumerary chromosome derived from chromosome 15. These results emphasize the need for molecular cytogenetic evaluation in patients with testicular failure before using advanced reproductive techniques.
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