An angiomyxoma involving the whole length of the umbilical cord. Prenatal diagnosis by ultrasonography.

Single and multiple umbilical cord cysts in early gestation: two different entities

“…Cysts of the umbilical cord have been described by ultrasound at various stages of gestation with a prevalence ranging from 0.4% to 3.4%1–3. While the presence of umbilical cord cysts in the second and third trimesters of gestation has been found to be strongly associated with chromosomal disorders and fetal structural defects, the clinical significance of umbilical cord cysts detected in early gestation is still controversial4–16. Sepulveda et al 17 and others1, 2 reported that the presence of isolated umbilical cord cysts in the first trimester of gestation is not associated with an adverse pregnancy outcome.…”

The natural history of an umbilical cord hemangioma

“…First, edema of the umbilical cord appears to be a common feature of cord hemangiomas . Progressive edema of Wharton's jelly and cystic degeneration could lead to vessel compression that would contribute to potential for circulatory compromise from the mass.…”

Large pseudocyst of the umbilical cord associated with patent urachus

“…Prenatal identification of umbilical pseudocysts is important because they are associated with fetal trisomy and other congenital anomalies, including omphalocele, vertebral defects, imperforated anus, tracheo‐esophageal fistula, radial and renal dysplasia association, and angiomyxoma of the cord 6–8 …”

“…The exact mechanism of the umbilical cord pseudocyst remains unknown. One hypothesis suggests that prolonged reflux of hypo‐osmolar fetal urine into the Wharton's jelly via a patent urachus might cause localized edema and formation of pseudocysts 8,16 …”