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Congenital umbilical hernia is a congenital malformation of the navel (umbilicus). Among adults, it is three times more common in women than in men; among children, the ratio is roughly equal. [3] It is also found to be more common in children of African descent. [4] [5] [6]
A urachal cyst is a sinus remaining from the allantois during embryogenesis.It is a cyst which occurs in the remnants between the umbilicus and bladder. [1] This is a type of cyst occurring in a persistent portion of the urachus, presenting as an extraperitoneal mass in the umbilical region.
Urachal fistula: there is free communication between the bladder and umbilicus; Urachal diverticulum (vesicourachal diverticulum): the bladder exhibits outpouching [5] Urachal sinus: the pouch opens toward the umbilicus [6] The urachus is also subject to neoplasia. Urachal adenocarcinoma is histologically similar to adenocarcinoma of the bowel ...
Twenty to 27% of individuals with a laryngeal cleft also have a tracheoesophageal fistula and approximately 6% of individuals with a fistula also have a cleft. [4] Other congenital anomalies commonly associated with laryngeal cleft are gastro-oesophageal reflux, tracheobronchomalacia, congenital heart defect, dextrocardia and situs inversus. [5]
Umbilical urachal sinus. Umbilical-urachal sinus is a congenital disorder of the urinary bladder caused by failure of obliteration of proximal or distal part of the allantois, and the presentation of this anomaly is more common in children and rarer in adults.
In addition to change in shape being a possible side effect from ascites and umbilical hernias, the navel can be involved in umbilical sinus or fistula, which in rare cases can lead to menstrual or fecal discharge from the navel. Menstrual discharge from the umbilicus is a rare disorder associated with umbilical endometriosis. [11] [12]
A biliary fistula is a type of fistula in which bile flows along an abnormal connection from the bile ducts into a nearby hollow structure. Types of biliary fistula include: bilioenteric fistula: abnormal connection to small bowel, usually duodenum. thoracobiliary fistula: abnormal connection to pleural space or bronchus (rare).
About two percent of fetuses exhibit a type of vitelline fistula characterized by persistence of the proximal part of the vitelline duct as a diverticulum protruding from the small intestine, Meckel's diverticulum, which is typically situated within two feet of the ileocecal junction and may be attached by a fibrous cord to the abdominal wall ...