Abstract
The urachus is a connection between the early fetal bladder and the allantois that typically obliterates during fetal life or in the neonatal period, leading to the formation of the median umbilical ligament. The persistence of a urachal remnant was first described in 1550 by Bartholomaeus Cabrolius. Most urachal remnants are classified into four groups: (1) patent urachus, (2) urachal diverticulum, (3) urachal cyst, and (4) urachal sinus [ [1] Begg R.C. The urachus: its anatomy, histology and development. J Anat. 1930 Jan; 64 (PMCID: PMC1250190): 170-18317104266 PubMed Google Scholar , [2] Ueno T. Hashimoto H. Yokoyama H. Ito M. Kouda K. Kanamaru H. Urachal anomalies: ultrasonography and management. J Pediatr Surg. 2003 Aug; 38: 1203-1207https://doi.org/10.1016/s0022-3468(03)00268-912891493 Abstract Full Text Full Text PDF PubMed Scopus (0) Google Scholar ].
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