Dictionary.net

• Cyst occurring in a persistent portion of the urachus, presenting as an extraperitoneal mass in the umbilical region. It is characterized by abdominal pain, and fever if infected. It may rupture, leading to peritonitis, or it may drain through the umbilicus.

2010 - Medical Dictionary Database
By DataStellar Co., Ltd

• A c. of the abdominal region formed from a patent urachus.

1916 - Appleton's medical dictionary
By Smith Ely Jelliffe