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Chromosomal translocations occur in 10 to 15% of men with azoospermia. Thirty distinct X-autosomal balanced reciprocal translocations have been reported in the literature thus far. We present a novel case of azoospermia with a karyotype of 46,Y,t(X:16)(p22.1:p11.2). A 26-year-old, healthy, active duty male Solider presented with his dependent female partner for primary infertility. Female anatomical and endocrine evaluations were normal. Initial male evaluation revealed azoospermia on multiple semen analyses. Further evaluation with a detailed physical exam and laboratory tests were normal except for an abnormal karyotype with a reciprocal translocation at chromosomes X and 16. An open testicular biopsy demonstrated 75% late spermatid maturation arrest confirming reproductive potential although significantly reduced. Men who present with azoospermia should undergo a full endocrine and genetic evaluation with a thorough physical evaluation by an urologist. They can have limited but successful reproductive outcomes if spermatozoa can be isolated during testicular biopsy. Given the high risk of producing genetically unbalanced embryos, genetic counseling and preimplantation genetic testing is essential before pursuing assisted reproductive technology. This case is the first X-autosomal balanced reciprocal translocations involving chromosome 16 and highlights the importance of the X chromosome during spermatogenesis.

Azoospermia Secondary to a Novel X-Autosomal Reciprocal Translocation: 46,Y, t(X:16)(p22.1:p11.2)