A<unk>  is present at the site of the umbilicus (commonly called a navel or belly button) in newborns; although sometimes quite large, these<unk> s tend to resolve without any treatment by around the age of 2–3 years. Obstruction and strangulation of the<unk>  is rare because the underlying defect in the abdominal wall is larger than in an inguinal<unk>  of the newborn. The size of the base of the<unk> ted tissue is inversely correlated with risk of strangulation (i.e., a narrow base is more likely to strangulate). Babies are prone to this malformation because of the process during fetal development by which the abdominal organs form outside the abdominal cavity, later returning into it through an opening which will become the umbilicus.<unk> s may be asymptomatic and present only as a bulge of the umbilicus. Symptoms may develop when the contracting abdominal wall causes pressure on the<unk>  contents. This results in abdominal pain or discomfort. These symptoms may be worsened by the patient lifting or straining.
Umbilical hernia
Paraumbilical hernia
Omphalocele
Rectocele
Umbilical granuloma
Retrocolic hernia
Spigelian hernia
Persistent cloaca