Assertion: umbilical cord's remnant | /r/HasProperty | urachal sinus
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Source sentences:
text: Urachal remnants - The developing bladder remains connected to the allantois through the urachus, and remnants of this connection include a patent urachus, urachal sinus, and urachal cyst; umbilical polyps and granulomas can also be observed in association with a urachal remnant