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Unilateral absence of the vas deferens is usually associated with ipsilateral absence of the kidney [35] and probably has a different genetic causation. Men with unilateral absence of the vas deferens are usually fertile, and the condition is most commonly encountered as an incidental finding in the vasectomy clinic. Nevertheless, in men with unilateral absence of the vas deferens, cystic fibrosis mutations may underlie the same genetic diseases as those with true CBAVD. In addition, it was found that men bilateral absence of vas deferens and renal abnormalities have no CFTR abnormalities [36]. |
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Tests for cystic fibrosis mutations should be undertaken in men who are found to have unilateral absence of the vas deferens and/or seminal vesicles and normal kidneys or bilateral absence or bilateral abnormality. If the results are negative and renal anatomy has not been defined, it is worthwhile obtaining an abdominal ultrasound. Findings may range from unilateral absence of the vas with ipsilateral absence of the kidney to bilateral vasal abnormalities and renal abnormalities, such as pelvic kidney. |
