Crossed testicular ectopia, also called transverse testicular ectopia, is an uncommon congenital anomaly in which both testes migrate through a single inguinal canal toward the same hemiscrotum. More than 100 cases have been reported in the literature. This rare syndrome is commonly associated with abnormalities of genitourinary development, especially inguinal hernia and defective Mullerian regression. A conservative approach is recommended, now performed via laparoscopy. Long-term follow-up is required for assessment of fertility and early detection of testicular malignancy. The authors report a new case of crossed testicular ectopia in a 4-year-old boy who presented with right inguinal hernia and impalpable left testis.
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