Thick, white, toothpaste-like material is produced between 2 obstructed segments as seen in men with segmental dysplasia of the vas deferens and with secondary epididymal obstruction. Our findings in men with segmental dysplasia of the vas deferens indicate that vasal "toothpaste" must be derived from vasal epithelium, not sperm.
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Anger et al. (2004) studied this question.
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