Objective: To report a translocation between chromosomes 3 and 4: 46,XY,t(3;4)(p25;q31.3) in a male infant with a disorder of sexual development.
Design: Case report.
Setting: University hospital.
Patient(s): A 1-year-old infant who presented with abnormal location of the urethral meatus.
Intervention(s): Cytogenetic analysis, fluorescence in situ hybridization (FISH), and serum concentrations measurement (using peripheral blood), and clinical examination.
Main Outcome Measure(s): Karyotype and clinical findings.
Result(s): On clinical examination, bilateral testicular volume and phallus were determined to be undersized. Serum concentrations of T and DHEAS were low. G-banding of his chromosomes showed that the patient had a balanced translocation involving chromosomes 3 and 4: 46,XY,t(3;4)(p25;q31.3). This karyotype finding was confirmed by FISH. The FISH analysis revealed the presence of sex-determining region (SRY). The proband inherited this translocation from his father. His sister had the same translocation. However, the father and sister of the proband were clinically normal.
Conclusion(s): The presence of this chromosomal anomaly and hypospadias was unique to our patient compared with others with the 46,XY,t(3;4) translocation. Although no such association has been reported to date, we think that the severe hypospadias in our case might be associated with this translocation.
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